Q: You are presented with the quiz "What harms the respiratory and circulatory systems?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "air pollution harms the respiratory and circulatory systems" and "smoking is a form of air pollution". So, what's the best answer to the question?

OPTIONS:
- Cars
- oxygen
- smoking
- vehicles
- emissions
- gasoline
- fresh air
- lungs

A: smoking

Q: You are presented with the quiz "products made from what are a big contributor to landfill waste" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plastics are made from petroleum and produce toxic waste" and "plastic is a big contributor to landfill waste". So, what's the best answer to the question?

OPTIONS:
- burning coal
- acetic acid
- tin
- hydrocarbons
- brass
- Pesticides
- petroleum
- recyclables

A: petroleum

Q: You are presented with the quiz "When do moose begin behavior intended to attract a mate?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "courtship is behavior that is intended to attract a mate" and "moose courtship begins in autumn". So, what's the best answer to the question?

OPTIONS:
- Winter
- howling
- The past
- sweating
- Summer
- autumn
- ligt
- movement

A: autumn

Q: You are presented with the quiz "what are multicellular eukaryotes with cell walls made of cellulose?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plants are multicellular eukaryotes with cell walls made of cellulose" and "water lillies are one of the most ancient angiosperm plants". So, what's the best answer to the question?

OPTIONS:
- mushrooms
- humans
- peachleaf willow
- water lillies
- important habitats
- Conifers
- vegetation
- h2o

A:
water lillies