Problem:OPTIONS:
- environment
- lysosomes
- food
- cytoplasm
- rhizome
- light energy
- flagella
- the skin

You are presented with the quiz "Bacteria gets help moving from what? " But you don't know the answer, so you turn to your teacher to ask for hints. He says that "flagella help prokaryotes move" and "bacteria are prokaryote cells". So, what's the best answer to the question?
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A: flagella

Problem:OPTIONS:
- rainy
- ligt
- cold
- stormier
- colder
- hotter
- longer
- air cools

You are presented with the quiz "what do days become in fall?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when the seasons change from the summer to the fall , the amount of daylight will decrease" and "then the days become colder and the number of daylight hours decreases". So, what's the best answer to the question?
****
A: colder

Problem:OPTIONS:
- blood
- humans
- Man
- bacteria
- cells
- oxygen
- skin
- keratin

You are presented with the quiz "Tissues form skin, what forms tissue?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cells are organized into tissues, and tissues form organs" and "skin is a protective organ". So, what's the best answer to the question?
****
A: cells

Problem:OPTIONS:
- alveoli
- Epidermis
- clouds
- plants
- HIV
- animals
- humans
- volume

You are presented with the quiz "what do some viruses live in a dormant state inside?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some viruses live in a dormant state inside the body" and "humans have bodies". So, what's the best answer to the question?
****
A:
humans