Question

a student is investigating snails and sunlight. what would be the best hypothesis for this experiment? does the amount of light affect the size of snails? why do snails like sunlight? snails do not prefer sunlight. if sunlight is increased, there is more movement in snails.

Explanation:

A hypothesis is a test - able prediction. The first two options are questions, not hypotheses. The third option is a statement but not as test - able as the fourth one. The fourth option, "If sunlight is increased, there is more movement in snails", presents a relationship between sunlight and snail movement that can be tested experimentally.

Answer:

If sunlight is increased, there is more movement in snails.