Paragraph development by cause and effect is the basis of logical reasoning, a widely used device in both general and applied writing. It is believed that every effect should have a cause either immediate or remote. We need to acquire this skill to develop our writing ability.

Sample:

      Although fear of math is not a purely female phenomenon, girls tend to drop out of math sooner than boys. Why the differences in performance? One reason is the amount of math learned and used at play. Another may be the difference in male-female maturation. If girls do better than boys at all elementary school tasks, then they may compute better for no other reason than that arithmetic is part of the elementary curriculum. As boys and girls grow older, girls become, under pressure of the sex-role assigned by the society, academically less competitive.