Question

the next day mrs. campbell brings in snails, water weeds, and racks of test tubes. \your job is to investigate which gases are produced by plants and snails, both in the light and in the dark. we will start tomorrow.\ what do you think will happen for snails? in light, snails will produce dropdown and use up dropdown with options oxygen, carbon dioxide in the dark, snails will produce dropdown and use up dropdown

Explanation:

Snails are animals. In the light, they carry out cellular respiration. Cellular respiration uses oxygen ($\ce{O2}$) and produces carbon dioxide ($\ce{CO2}$). In the dark, they still carry out cellular respiration (as it is a continuous process for animals to release energy from food), so they also produce carbon dioxide and use up oxygen.

Answer:

In light, snails will produce carbon dioxide and use up oxygen. In the dark, snails will produce carbon dioxide and use up oxygen.