[answer correctly for brainliest]
Index fossils are used to determine the relative ages of rock and fossils and are also used to

A) define the boundaries between geologic periods
B) determine the absolute age of surrounding rock
C) identify the fossil species found in rock layers
D) infer evolutionary relationships between organisms

Correct answer is A) to define the boundaries between geologic periods.

Explanation:

To define boundaries an index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek

burning fossil fouls really decrease the carbon in the atmosphere so b