Question

what what an usual occurrence did the volunteers notice​

Answer 1

turtle eggs

Explanation:

the unusual occurrence is that the turtle eggs had been on the beaches of konkan.

Answer 2

Answer:

the volunteers noticed some shallow pits with white egg shells on the beach.Enquries revealed that they were turtle eggs. this was unusual for the volunteers as they has never before come across turtle eggs on their walks along the kon kan beaches in all the previous years.