Question: You are presented with the quiz "Coral reefs provide food and shelter to animals that require what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "coral reefs provide food and shelter to many ocean organisms" and "salinity is vital for animals that live in the ocean". So, what's the best answer to the question?
OPTIONS:
- Light
- beaches
- survive
- salinity
- land
- sand
- Energy.
- Energy
Answer: salinity

Question: You are presented with the quiz "what makes a river wider?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "erosion causes a river to become deeper and wider" and "clearing of land can lead to erosion of soil into the river". So, what's the best answer to the question?
OPTIONS:
- rainfall
- salinity
- arteries
- flow of electrons
- Water expanding
- Physical weathering
- a hydraulic system
- clearing land
Answer: clearing land

Question: You are presented with the quiz "What has a negative impact on a species population size?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "harming an animal species has a negative impact on the population size of that species" and "people understand that habitat destruction and pollution are harmful to wildlife". So, what's the best answer to the question?
OPTIONS:
- influenza
- assistance
- pollution
- distractions
- liver cancer
- copper
- Pesticides
- disease
Answer:
pollution