Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. which of the following best describes what index fossils be used to determine?

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hello

question:

when would a new household be started?

a.when the oldest male died

b.when a man and a woman married

c.when the house could not hold everyone

d.when a child was born

answer: us d when a child was born

hope this have a great day and brainlest