Final answer:
The dependent variable that should be measured in the experiment on the effects of a new antimold product is the amount of mold growth.
Step-by-step explanation:
The dependent variable that should be measured to establish an effect in this experiment is Amount of mold growth. In the experiment conducted on the effects of a new antimold product, the researchers would be interested in measuring the amount of mold growth to determine the effectiveness of the product in inhibiting mold growth. The other options, such as the amount of antimold product, humidity, and temperature, may be independent variables in the experiment, but they are not directly related to establishing the effect of the product on mold growth.