What is the microscopic building block of any living being?\nOptions:\n- (A) trees\n- (B) cell\n- (C) oxygen\n- (D) moss\n- (E) molecule\n- (F) plants\n- (G) blood\n- (H) life
Please answer the following question by reasoning step-by-step.
(B)
Cells are the microscopic building blocks of organisms.

Any living being is an organism.

Cells are the microscopic building blocks of living beings.

.

Thus, the answer is (B)