input: OPTIONS:
- Cold air forming fog
- a hemisphere is tilted away from the sun
- Warm air near the oceans
- Breathing too fast or too slow
- Cold winds near the mountains
- Warm air moving into cold air
- Earth's axis of rotation is tilted
- extreme heat and pressure Now, answer this question: You are presented with the quiz "What causes cloudy and rainy weather?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "awarm front causes cloudy and rainy weather" and "warm air moving into an area of cold air is called a warm front ". So, what's the best answer to the question?
A:
output: Warm air moving into cold air

input: OPTIONS:
- hair
- bushes
- keratin
- food
- shells
- appendages
- energy
- sponges Now, answer this question: You are presented with the quiz "What can animals use for protection?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "shelter is used for protection by animals against weather" and "many animals use sponges for shelter". So, what's the best answer to the question?
A:
output: sponges

input: OPTIONS:
- the Sun
- insects
- starfish
- barnacles
- ferns
- water
- Conifers
- humans Now, answer this question: You are presented with the quiz "What lacks respiratory and excretory systems?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "echinoderms lack respiratory and excretory systems" and "echinoderms are represented by the starfish". So, what's the best answer to the question?
A:
output:
starfish