Problem:OPTIONS:
- energy
- lights
- engine
- cycles
- brakes
- waves
- water
- Vibrates

You are presented with the quiz "what are on when there is flow of current in an electrical circuit" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "aswitch is used to start the flow of current in an electrical circuit" and "electrical power including lights etc can then be switched on". So, what's the best answer to the question?
****
A: lights

Problem:OPTIONS:
- edible
- Energy.
- exercise
- Cooking
- nutrients
- Proteins
- oysters
- Energy

You are presented with the quiz "Having what things has a positive impact on an organism 's health?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "having food has a positive impact on an organism 's health" and "and anything edible is food". So, what's the best answer to the question?
****
A: edible

Problem:OPTIONS:
- during rain-less periods
- at or near the margins
- after a drought
- Decreased precipitation
- after too much water received
- after not enough water
- near the shoreline
- the wearing away of rock

You are presented with the quiz "When does a flood occur in a lake?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when a body of water receives more water than it can hold , a flood occurs" and "lakes are large bodies of inland water". So, what's the best answer to the question?
****
A: after too much water received

Problem:OPTIONS:
- embryos
- a fish
- ovaries
- grow
- teeth
- survive
- NaCl
- oxygen

You are presented with the quiz "Adult frogs have what and breathe with gills as larvae?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most amphibians breathe with gills as larvae and with lungs as adults" and "an adult frog has lungs and teeth". So, what's the best answer to the question?
****
A:
teeth