Question

what is the mass of an earthworm? select the better estimate. 4 kilograms 4 grams

Explanation:

Step1: Understand mass units

Kilogram ($kg$) is large, gram ($g$) is small. Earthworms are small.

Step2: Compare options

4 kg is heavy (like a small animal), 4 g is light, fitting an earthworm.

Answer:

4 grams