What kind of pollution might cause whales and dolphins to strand on beaches?

Marine pollution is the cause for dolphins and whales to strand on beaches.

Explanation:

Marine pollution is caused by the combination of chemicals and trash, industrial and residential waste, plastic waste, etc that are washed away from land sources into the ocean which causes harmful effects to the health of marine living organisms. Frequently dolphins and whales strands on the beaches because of the plastic wastes that are consumed by whales and in case of dolphins some plastic stuck up in their nose which blocks to them breath freely thereby resulting to death. These organisms die because of pollution and changes in the direction tides push these dead animals to shore.