Answer:
For several months, weighing and measuring the pups every week
Explanation:
This is to control variables and keep a measurable set of data that can prove or disprove the theory they had developed, and also to isolate cases that can't be attributed to the experiment they had carried out, like puppies loosing weight due to illnesses, or behavioral factors.
I think the answers are 2
Fossil hunters can be good stewards by respecting the area around the dig site. Instead of getting big machinery to do the dig and ruining the area around the fossil, they can instead be careful in obtaining the fossils.
<span>Maintaining a patent airway</span>
