A scientist is studying the regrowth of giant sequoia trees
after a forest fire. The scientist plans to count the numbers
of seedling trees in two different areas of forest. One area
has experienced a recent fire. The other area has not. The
scientist will evaluate the data to determine whether there
are any differences in the two areas of forest.
Which type of scientific investigation does this plan describe?
A. Experimental investigation.
B. Descriptive investigation
C. Comparative investigation
D. Controlled investigation​