What determines the end of the hadean eon is
a. early signs of life on earth
b. beginning of photosynthesis
c. the whole planet froze over
d. the birth of the moon
e. the earth molten core hardened

A. Early signs of life on earth

Explanation:

The Hadean, before the Archean, is the first geologic eon of Earth. It began with the formation of the Earth about 4600 million years ago and ended 4,000 million years ago. The planet had just formed and was still very hot due to high volcanism, a partially molten surface. Some geologists labels the period before the earliest-known rocks on Earth. At the end of it much cooler surface temperature and the formation of solid rock enabled to flaurish the life.

structure is maintained and sustained by:

-cytoskeleton: gives cells coherence

-cell wall: support

-cytoplasm: shape

hope this .