PLEASE HELP, will mark brainlest, to who answers with the correct answer What is some BIOLOGICAL EVENTS.

A bioevent or bio-event (a shortening of 'biotic event' or 'biological event') is an event recognised in a sequence of sedimentary rocks, where there is a significant change in the biota as recorded by assemblages of fossils over a relatively short period of time.

Explanation:

1.According to Greek legend the war between the Greeks and the people of Troy was a long and bloody one.  And at the center was Helen, the most beautiful woman in all of Greece. And Paris, the Trojan prince who loved her.  PLZ HELP ME THIS IS A GRADE!!  

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

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