why tropical storms and cyclones are unlikely to form near the equator?

Answer 1

Due to the Coriolis Effect caused by the Earth's spin, tropical storms, hurricanes, and cyclones don't form within 5 degrees of the equator.

How the Earth spins makes the air move and causes water to curve. The Earth spins faster at the equator than at the poles. When air moves away from the equator, it keeps that speed, and the wind seems to turn as it passes the parts of the Earth that spin more slowly, making it seem like it is curving.

At the equator, the curving effect is too weak, so storms can't start to spin in order to form. They need the rotational motion to build up to create storms.