The fossil record shows life originated on Earth at least 3.5 billion years ago and consisted entirely of microorganisms. Paleontologists provide the strongest evidence of this conclusion through the discovery of:.

stromatolites

Explanation:

Stromatolites or stromatoliths are layered mounds, columns, and sheet-like sedimentary rocks that were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe. Fossilized stromatolites provide records of ancient life on Earth.

Stromatolites or stromatoliths are layered mounds, columns, and sheet-like sedimentary rocks that were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe. Fossilized stromatolites provide records of ancient life on Earth.

Explanation:

Because yess

i think the answer is

mass

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.