Answer:
the quantity of milk drank by the kittens
Step-by-step explanation:
Dependent variables are the actual variables a researcher sets out to determine during the course of an experiment. In order words, dependent variables are variables that are measured during experiments whose values fluctuate with the change of other variables.
In this case, a change in the type of milk given to the kittens affected the quantity of milk drank by the animals.
The actual variable being measured in this experiment is the amount to milk drank by the kittens.
Hence, the dependent variable is the quantity of milk drank by the kittens.