Science can answer many questions for example the speed of light, the frequency of pitch or sound, dna tests
Answer:
7.8 Billion, but to round it...t is 8 Billion
Explanation:
This is the question to search up. I don't think anyone but the internet knows how many people exist...if you understand.
It’s number 4 I believe please give me Brainlest
From a modern genetic perspective, this is defined as evolution.