Question

part a what is the independent variable in this experiment? a fish weight b tank brand c amount of food d amount of water

Explanation:

To determine the independent variable, we analyze the options. The independent variable is the one manipulated to observe its effect on the dependent variable (fish weight here). Among the options, "tank brand" (B) is likely the manipulated factor (e.g., testing different tank brands' impact on fish weight), while fish weight (A) is dependent, and food/water (C, D) might be controlled variables. So the independent variable is tank brand.

Answer:

B. tank brand