Concept:Paramecium reproduces asexually by dividing into two daughter cells. This is called binary fission. Because it is the main asexual method, it is the correct answer.Explanation:A mature Paramecium cell undergoes simple division. First, its nucleus divides into two parts. Then the cell splits across its body to form two smaller daughter cells. Each new cell grows to full size. This method of reproduction is asexual because only one parent is involved. Paramecium also performs sexual processes like conjugation, but binary fission is the common reproductive mode. Since the options list only asexual methods, binary fission is the natural choice.Answer:A. binary fission