Answer:
A tectonic plate movement affect the formation of an atoll is described below in brief details.
Step-by-step explanation:
An atoll is a collection of coral islets that has developed around the rim of an obsolete submerged volcano producing an inner lagoon or round-shaped coral reef. Atoll formation is secondary to land erosion and the extension of coral reefs encompassing the island. Coral reef atolls can only grow in tropical zones that are the perfect place for coral germination.