Explanation

Overcasting is a suitable neatening for the side seam of a school short because it:
· Encloses the raw edge of the fabric
· Prevents fraying and unraveling
· Provides a clean and finished appearance
· Is a simple and quick technique
The other options are not as suitable for neatening the side seam of a school short.

Other choices do not fit as well. Each has a reason why it does not answer the question correctly. Understanding why wrong answers are incorrect helps reinforce the right answer.

This knowledge is important for Home Economics. It helps in daily life and builds practical skills for managing homes and families effectively.