You are presented with the quiz "What do some cacti use waxy leaves for?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "waxy leaves are used for storing water by some plants" and "many cacti also have a waxy coating that helps the plant conserve moisture in desert climates". So, what's the best answer to the question?
OPTIONS:
- hydration
- Chemical energy
- storing water
- it needs them
- support
- survival
- to stay warm
- cellulose

Answer: storing water

You are presented with the quiz "what can break down rocks?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mechanical weathering is when rocks are broken down by mechanical means" and "ice wedging is the most important form of mechanical weathering". So, what's the best answer to the question?
OPTIONS:
- Jellyfish
- sea urchins
- deltas
- erosion
- ice wedging
- room temperature
- clouds
- cliffs

Answer: ice wedging

You are presented with the quiz "Computers run when what is working properly?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when an electrical circuit is working properly , electrical current runs through that circuit" and "currently computers run on electric circuits and wires". So, what's the best answer to the question?
OPTIONS:
- metal forks
- an engine
- lowered energy cost
- deoxyribonucleic acid
- plastic switches
- objects that have mass
- power ballads
- electrical circuit

Answer:
electrical circuit