Acontrolled experiment tests the effects of two variables true or false

False

Explanation:

A controlled experiment is an experiment that allows us to the test the effect of a single variable.

In a controlled experiment, just one of the factors is affected.

Controlled experiments are only carried out under very strict and controlled conditions.

In controlled experiment we have the experimental and control groups. We also have the Dependent and Independent variable in a control group.

showing a photograph would make this a hell of alot easier

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: