user: In one sentence, describe what the following article is about: There are 2 main types of beans used to make coffee. Arabica beans are the kind grown in high-altitude regions. They have a sweeter, more acidic taste in addition to being less bitter than Robusta beans, which are grown in low-altitude areas. Since these beans are so popular despite being harder to grow, they also tend to be more expensive.  There is more to a good pot of coffee than the type of bean you choose. Factors like the growing condition and handling affect the flavor of the bean, so you may end up liking a Robusta brew better than an Arabica one. A cup of coffee made from Robusta beans has about twice as much caffeine than one made from Arabica. The additional caffeine gives the coffee more of a bitter taste. Coffee comes from all over the world, which means many different flavors for you to enjoy. You can make good coffee with beans from any location, so it all comes down to personal preference. Test out different products to find what makes your perfect pot of coffee. Even products from the same country can taste very different from one another.  Coffee beans from Africa tend to have a strong, robust flavor. Drinkers often compare the taste to grapes and other types of fruit. Kenya and Ethiopia are a couple of common sources of African beans. Beans from South America often have a strong but sweet flavor often compared to chocolate and nuts. Brazil and Colombia are a few common sources. Other sources, like Hawaii and Asia, tend to produce earthy beans. It leads to rich, smooth coffee with a flavor comparable to the taste of edible flowers and plants. All coffee is roasted, so don’t be fooled by product labeling. A dark roast means that the beans were toasted so long that they turned black. At that point, you taste more of the roast than the flavor of the beans in your coffee. Stick to light or medium roasts if you like sweeter, tangier coffee with more caffeine in it.  Dark basically means burnt in coffee. The beans become charred and oily as they are roasted. Coffee made from these beans often tastes bitter or even burned. Medium roasts are popular in a lot of places. Coffee made from these beans tends to have a strong and balanced flavor. Coffee begins losing its flavor as soon as it is processed. Beans are best when used within a week of the listed date, but that isn’t always possible. Check the date when buying or selecting a bag before you make coffee. Try to use the freshest beans for more flavor.  Although coffee seems like it lasts forever, it doesn’t. Old beans and grounds are useable, but the end result doesn’t taste the same as coffee brewed from a fresh product. If the coffee bag doesn’t have a roasting date on it, then consider avoiding it. You don’t know how long it has been sitting around. Heat, light, air, and moisture all affect how coffee tastes. To prevent your beans from deteriorating, keep them in the bag until you’re ready to use them. Then, move them into a container that isn’t transparent. Store the container in a sheltered spot, such as inside a kitchen cabinet.  Beans can be stored in the fridge or freezer if you're careful. Keep them in a well-sealed container to reduce the possibility of moisture damage or freezer burn. No matter how well you store your beans, you can't preserve them forever. To get the best quality coffee, use beans as soon as possible. If you’re using fresh beans, you’re going to have to grind them up yourself. The size you need depends on the type of coffee-making equipment you’re using. For drip coffee machines, use medium-size grounds. Adjust your grinder to a medium setting if you’re using one.  Fine grounds are similar in consistency to sand and are good for making espressos. Medium-fine grounds are great for pour over coffee. Switch to course grounds for French press coffee.
Summary: Choose Arabica beans for a more flavorful cup of coffee. Pick a country of origin according to your taste preference. Select a lighter roast to taste more of the bean’s flavor. Use coffee within a month of the roast date on the package. Store beans in a sealed container away from sunlight. Select a grind size if you’re using grounds.

In one sentence, describe what the following article is about: If the bird is jumping from one perch to another continuously then your bird is restless. You should immediately pay attention because something is bothering your bird and it is trying to communicate with you. Birds also tend to show this behavior when they are seeking attention or just want to come out of the cage. If this behavior is accompanied by clicks and vocalization, such as loud chattering, more often than not, your bird wants to play with you and is demanding your attention. If the bird remains still and its feathers are tightly packed close to the body, your bird has spotted some danger. It is trying to remain as still as possible to avoid being spotted. Birds have a lot of natural enemies and they exhibit this behavior to escape unwanted attention.  Birds tend to fix their eyes on the source of the danger. Watch the bird closely. It is trying to warn you and point you to the source of the threat. Do not pick or move your bird while it is exhibiting these behaviors. If your bird is looking outside the window, close the window blinds and then go to your bird to comfort it. Your bird could feel threatened by anything, including a new couch or a new lamp in your living room. To find out if your bird associates danger with a new article in the room, walk towards the article and then stay there for a minute. Touch the new article and be relaxed. Birds will quickly learn there is no reason to be worried. Your bird may be trying to show its dominance if it raises its head and perches above your eye level. It may also begin to "growl" to show its aggression. This behavior may occur if your bird feels threatened or protective due to having strangers in the room or a person nearby that your bird is not fond of.
Summary:

assistant: Look for restlessness. Notice signs that your bird has spotted danger. Identify signs of aggression.