Question

practice it!
which of the following are examples of a
comparative investigation?
a mechanic looking under the hood of a car
and listening to diagnose a problem before
and after the vehicle is turned on.
a vet recording how a dog behaves before
and after a cat is introduced into their
environment.
watching a bird for 15 minutes and recording
what it does.
a doctor watching and recording changes in
a patients vital signs before and after a
medicine is given.
performing an experiment in a laboratory.
group 1

Explanation:

A comparative investigation involves observing and comparing subjects or phenomena under different conditions. In the first option, the mechanic compares the car's state before and after it's turned on. The second option has the vet comparing the dog's behavior before and after the cat's introduction. The fourth option has the doctor comparing the patient's vital signs before and after medicine. The third option is just observing a bird without comparison. The fifth option is an experiment, not a comparative investigation.

Answer:

A. A mechanic looking under the hood of a car and listening to diagnose a problem before and after the vehicle is turned on.
B. A vet recording how a dog behaves before and after a cat is introduced into their environment.
D. A doctor watching and recording changes in a patient’s vital signs before and after a medicine is given.