Removing a specific group of trees within a small area over a long period of time is a. clearcutting b. shelterwood cutting c. group selection d. single tree selection

The answer is c. group selection.

Group selection is an evolutionary mechanism in which natural selection acts at the level of a group and not at the level of an individual. Statement over a long period of time suggests it must be the evolutionary process, so through the process of elimination, a possibly right answer could be c. or b. But, group selection affects groups, leaving the answer c. as the right one.

Oh dog

The name of the instrument that the scientist uses is called a microscope.a microscope is used to view objects which is not visible to the naked eyes