I see pictures above , what do you exactly need help with?
Answer:
conservation of natural resources
Explanation:
You're trying to save resources, all the other options cause harm
I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group <span>is defined as the </span>group<span> in an experiment or study that does not receive treatment by the researchers.</span>
The correct answer would b c
