Question

why does the earth have optimum temperature answer in brief

Answer 1

Because it is at a perfect distance from the earth, not too far to be cold and not too close to be hot
This is the biggest reason

Other reasons are that it has a lot of water, lot of trees, perfect atmospheric gases.

Answer 2

heya dear frnd here is your answer
earth have a optimum t3mprature bcoz
(1)it is 8n accurate or average distance from sun,and is very afflicable particles
it has water , n other such things which makes it comparable with other planet, it has a cover of atmosphere which act as a layer of protection, abundant of water,and such soils which other planet does not have
,