Q: You are presented with the quiz "cutting down trees has a negative impact on the health of what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cutting down trees has a negative impact on an ecosystem" and "when ecosystems are healthy, humankind is healthy". So, what's the best answer to the question? | OPTIONS:
- space
- humankind
- mars
- aliens
- salmon
- Species
- humans
- plants
A: humankind

Q: You are presented with the quiz "what kind of females does fertilization take place in?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "fertilization takes place inside the female organism" and "humans are complex organisms". So, what's the best answer to the question? | OPTIONS:
- humans
- fertile
- plants
- bees
- orchids
- sperm
- Flowers
- post-menopausal women
A: humans

Q: You are presented with the quiz "what do antibodies recognize and bind to?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "antibodies are large, Y-shaped proteins that recognize and bind to antigens" and "antigens are expressed by cancer cells". So, what's the best answer to the question? | OPTIONS:
- humans
- vitamins
- h2o
- harmful substances
- cancer cells
- electrons
- the skin
- protect them
A: cancer cells

Q: You are presented with the quiz "The thing that cools the body contains what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sweat wets the skin, and when it evaporates, it cools the body" and "sweat is water, salt, some urea". So, what's the best answer to the question? | OPTIONS:
- liquid
- matter
- vapors
- oxygen
- Urea
- nektar
- water
- Air
A: Urea