The correct answer is Option 3: 

A convex polygon has all interior angles less than 180° and no part of the polygon bends inward. 

Option (a) — Not correct: The figure is not even a proper polygon (it has curved sides). A polygon must have only straight line segments.

Option (b) — Not correct. The shape is concave because it has indentations (inward bends). Some interior angles are greater than 180°.

Option (c) — Correct: This is a convex polygon because:

• All sides are straight
• No inward bending
• All interior angles are less than 180°

Option (d) — Not correct- This shape is concave due to inward bending (one interior angle > 180°).