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.
Answer: C. Involves the replication of environmental conditions and human responces to those conditions
Explanation:
The answer is D. Always true in all places
It is another type of full moon, happens in different sub divisions of a year. It gets it names from its appearance, as a blue lighting color.