Question

how does the sea anemone catch its food?
using electric shocks
by suction feeding
with rings of tentacles surrounding its central mouth
by swimming after prey

Explanation:

Sea anemones have rings of tentacles around their central mouth. These tentacles have stinging cells (nematocysts) that can capture small organisms like plankton, small fish, etc. when they come in contact. They do not use electric shocks (like some electric eels), suction feeding (like some fish with specialized mouthparts for suction - based feeding in a different way), and they are generally sessile (attached to a surface) so they do not swim after prey.

Answer:

With rings of tentacles surrounding its central mouth