Which object has a size similar to that of lapilli?

A marble of 15 mm

Explanation:

so lapilli is the size classification of tephra. it is the material that comes out in air during volcanic eruption. the word lapilli means little stones and its size ranges from 2 mm to 64 mm. so the object which has same size as lapilli is the marble.

option number c is the right answer.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr