Problem: Given the question: Given the background: River deltas form when a river carrying sediment reaches either (1) a body of water, such as a lake, ocean, or reservoir, (2) another river that cannot remove the sediment quickly enough to stop delta formation, or (3) an inland region where the water spreads out and deposits sediments. The tidal currents also cannot be too strong, as sediment would wash out into the water body faster than the river deposits it. The river must carry enough sediment to layer into deltas over time. The river's velocity decreases rapidly, causing it to deposit the majority, if not all, of its load. This alluvium builds up to form the river delta.[7] When the flow enters the standing water, it is no longer confined to its channel and expands in width. This flow expansion results in a decrease in the flow velocity, which diminishes the ability of the flow to transport sediment. As a result, sediment drops out of the flow and deposits. Over time, this single channel builds a deltaic lobe (such as the bird's-foot of the Mississippi or Ural river deltas), pushing its mouth into the standing water. As the deltaic lobe advances, the gradient of the river channel becomes lower because the river channel is longer but has the same change in elevation (see slope). and the situation: The Danube and Volga rivers both form large deltas, but the Danube river delta is larger and grows faster every year. Answer the following question: Which river carries more sediments?
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The answer is:
Danube

Problem: Given the question: Given the background: Population growth, especially in developing countries, should make people think about how fast they are consuming resources. Governments around the world should seriously consider these issues. Developing nations will also increase demands on natural resources as they build more factories ( Figure below ). Improvements in technology, conservation of resources, and controls in population growth could all help to decrease the demand on natural resources. and the situation: A new country called Zandonia has recently found itself in a crisis. They are consuming far to many natural resources. A recent study concluded that the amount of resources being consumed greatly increased over the past 3 years. This find coincides with a population boom in the region. Before the population boom the demand for natural recources was relatively stable. Answer the following question: Given a new study that shows a large decrease in Zandonias demand for natural resources, will the population have increased or decreased?
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The answer is:
decreased

Problem: Given the question: Given the background: New species develop naturally through the process of natural selection . Due to natural selection, organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers. Natural selection causes beneficial heritable traits to become more common in a population and unfavorable heritable traits to become less common. For example, a giraffe's neck is beneficial because it allows the giraffe to reach leaves high in trees. Natural selection caused this beneficial trait to become more common than short necks. and the situation: Greg and Frank were two friends that studied natural sciences. One day, Greg decided to start reading about natural selection. His friend Frank decided to read more about populations that displayed natural selection more sparingly. They both learned lots of new interesting facts. Answer the following question: Which friend learned more about animals that reproduce in greater numbers?
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The answer is:
Greg