You are presented with the quiz "acid rain is caused by burning what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "gases from burning coal and oil dissolving in water in the atmosphere causes acid rain" and "acid rain is caused by the burning of fuels such as oil and coal". So, what's the best answer to the question?
OPTIONS:
- lung
- grass
- oil
- Cars
- Coal
- peat
- nitrogen
- food

Answer: oil

You are presented with the quiz "where does being buried under soil and mud change peat into coal through extreme heat and pressure over a long period of time?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time" and "well, a swamp is a type of wetland". So, what's the best answer to the question?
OPTIONS:
- watershed
- alluvial
- wetland
- deltas
- erosion
- houses
- earth
- lakes

Answer: wetland

You are presented with the quiz "What do lobsters lack?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "invertebrates are animals that lack a vertebral column, or backbone" and "lobsters are invertebrates, animals without a backbone". So, what's the best answer to the question?
OPTIONS:
- heat energy
- Stomach
- a cuticle
- Claws
- backbone
- Eyes
- the skin
- Chlorophyll

Answer:
backbone