You are presented with the quiz "what can produce electricity?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "tidal energy can be used to produce electricity" and "tidal caves are formed by the energy of the rising and falling tides". So, what's the best answer to the question?

OPTIONS:
- rivers
- animal transport
- tidal caves
- Nematoda
- rays or beams
- animals
- cactuses
- photons

Answer: tidal caves

You are presented with the quiz "What is used for generating heat by burning?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "coal is used for generating heat by burning" and "fossil fuels are coal, oil and natural gases". So, what's the best answer to the question?

OPTIONS:
- carbon dioxide
- sunlight
- calcite
- Calcium carbonate
- water
- ice
- peachleaf willow
- fossil fuels

Answer: fossil fuels

You are presented with the quiz "What is produced by leaf cells as a carbohydrate by producers?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves" and "leaf cells produce sugar by photosynthesis". So, what's the best answer to the question?

OPTIONS:
- sugar
- glucose
- plants
- salt
- cane
- coffee
- food
- truvia

Answer: sugar

You are presented with the quiz "what light can animals not see?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "eyes are used for seeing by animals by sensing light" and "infrared light is invisible to the eye". So, what's the best answer to the question?

OPTIONS:
- Sand dollars
- electricity
- motion
- sun's heat
- photons
- our star
- heat
- infrared

Answer:
infrared