Correct Answer: (C) Sports Day

Step 1 - What a Sports Day is:

A Sports Day is an annual event organised by a school or institution in which students take part in various athletic and sporting competitions.

Step 2 - Its purpose:

It gives children and young people a platform to display their skills, talent and physical ability before parents, teachers and the community.

Step 3 - Why the others are wrong:

Run for Fun, Run for a specific cause and Health Run are all types of runs organised to spread awareness or promote fitness among the general public, not to showcase students' sporting ability.

Hence, option (C) is correct.