Which best explains a primary reason for the inability of life to exist in earths early atmosphere

There was insufficient energy from material collisions to change their density. High temperatures during Precambrian time caused surface water evaporation. Volcanic eruptions and comet collisions added different gases to the atmosphere.

fir trees are found in areas with cooler climates. fir trees have needles for leaves and remain green year-round.

sounds good to me mate!