B is the answer?!? Sorry if im wront
Your answer is
One of the most effective methods that can be used by researchers to avoid sampling bias is simple random sampling, in which samples are chosen strictly by chance. This provides equal odds for every member of the population to be chosen as a participant in the study at hand.
A contour interval is the lines on a topographic map that state the height (from sea level) of the hill, valley, mountain or the ground level.
The answer would be C. because velocity describes the speed of an object in any given direction
Enzymes are biological catalysts.They lower the activation energy necessary for the reaction to occur, and that makes the chemical reactions quicker in living cells.
