Question

In an experiment or investigation, what is a control?(1 point)
Responses

The variable that the experimenter controls or changes in the investigation.
The variable that the experimenter controls or changes in the investigation.

The variable that remains unchanged throughout the investigation.
The variable that remains unchanged throughout the investigation.

The purpose or reason for the experiment or investigation.
The purpose or reason for the experiment or investigation.

The variable that changes other variables in the experiment.

Answer 1

The correct response is:

**The variable that remains unchanged throughout the investigation.**