Question

mudcracks result from ___.
○ cooling of igneous rock
○ intrusion of magma
○ pirating of streams
○ drying of lake beds

Explanation:

Mudcracks form when wet mud dries out and contracts. Lake beds drying up can cause this. Streams pirating is about water - flow redirection and not related. Magma intrusion and igneous rock cooling form other geological features like intrusions and extrusions, not mudcracks.

Answer:

drying of lake beds