Q: You are presented with the quiz "What has a negative impact on the environment?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "pollutants have a negative impact on the environment" and "benzene, like ozone and particulate matter, is a nonthreshold pollutant". So, what's the best answer to the question?

OPTIONS:
- massive damage
- deforestation
- Hemp
- harmful substances
- Particulate matter
- Bamboo
- enormous damage to homes
- Biocompostables

A: Particulate matter

Q: You are presented with the quiz "What does an animal require to move?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "an animal requires energy to move" and "all foods provide energy". So, what's the best answer to the question?

OPTIONS:
- fat
- air
- skin
- warmth
- bone movement
- H20
- food
- heat

A: food

Q: You are presented with the quiz "What occurs in response to a change in the environment?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "evolution occurs in response to a change in the environment" and "natural selection is the main mechanism of evolution". So, what's the best answer to the question?

OPTIONS:
- relocation
- sunlight
- moonlight
- artificial selection
- ground to shake
- Animal survival
- natural selection
- It helps them survive

A: natural selection

Q: You are presented with the quiz "what is so small it can only be seen with an electron microscope?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses are so small that they can be seen only with an electron microscope" and "where most viruses are DNA, HIV is an RNA virus". So, what's the best answer to the question?

OPTIONS:
- clouds
- cell
- DNA
- ovum
- HIV
- magnified
- h2o
- RNA

A:
HIV