Answer:
Option (A)
Explanation:
In order to conduct an experiment, there are variables (parameters) that are dependent on the experiment. These variables can be either dependent or independent.
Dependent variables are those that cannot be changed throughout the experiment and are dependent on the independent variables.
On the other hand, the independent variables are those whose changes can have an effect on the experiment. These are the parameters that control the experiment.
In the above-given experiment, the amount of fertilizer is a factor that can be tested, as the amount of fertilizer is determined that is required for the entire crop field, containing tomato. It means that the amount of fertilizers needed to put on half of the plot will be again required to put on the remaining half of it.
Hence, the correct answer is option (A).
