We saw (1)/ sand sculptures (2)/ in the beach. (3)/ No error. (4)

Options

A. 1 We saw
B. 2 sand sculptures
C. 3 in the beach.
D. 4 No error

Answer

3

Explanation

on the beach will replace in the beach on (Prep.) is used for a surface in (Prep.) is used for an enclosed space
Look at the examples given below:
I am currently staying in a hotel. The author.s name is on the cover of the book.