A. He should add shells that are different colors, but the same size and type, to the tank and observe which shells the hermit crabs choose.
Durning an experiment you need to keep everything the same but only change the certain things based on your theory.
Such as how the student wanted to see if the color attracted the crab. If he had changed the size and type of the shell then the crab would have chosen the bigger one as they tend to grow into larger shells.
the answer is vascular seed forming plants and can I get brainliest
Answer:
Latitude is the distance north or south of the equator. Altitude is the height of an object above sea level.
Development of breast tissue
