You are presented with the quiz "what is the throwing up center of the brain used for?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the vomiting reflex is used to remove toxic material from the stomach before it is absorbed" and "vomiting is a reflex controlled by a vomiting center in the brain".   So, what's the best answer to the question?
OPTIONS:
- dissolving enzymes
- repair cells in the human body
- solving equations
- keeping food fresh for long periods of time
- remove toxic material from the stomach before it is absorbed
- Something that can be converted to kinetic and heat energy by a motor
- lower the surrounding pressure
- regulate breathing

Answer: remove toxic material from the stomach before it is absorbed


You are presented with the quiz "what can be found in moist soil near rivers and steams in tropical regions?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "caecilians can be found in moist soil near rivers and streams in tropical regions" and "cobra bobo is the local name for caecilian".   So, what's the best answer to the question?
OPTIONS:
- ferns
- insects
- humans
- cobra bobo
- storing water
- weathering
- animals
- clouds

Answer: cobra bobo


You are presented with the quiz "what converts chemical energy to mechanical energy when it moves?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when an animal moves , chemical energy is converted to mechanical energy" and "cows are social animals".   So, what's the best answer to the question?
OPTIONS:
- Birds
- bears
- cows
- Whales
- toads
- hawks
- cars
- fish

Answer:
cows