Question

practice it!
which of the following statement(s) best defines an experimental investigation?
a type of investigation that is conducted under controlled conditions in which a variable is identified.
a type of investigation where two or more things are being studied and described.
a type of investigation performed by observing something in its natural environment.
a type of investigation performed by observing something in its natural environment and comparing two or more things.

Explanation:

An experimental investigation is conducted under controlled conditions where a variable is identified. The other options describe observational or descriptive investigations.

Answer:

A. A type of investigation that is conducted under controlled conditions in which a variable is identified.