Question

currently there are over 7.7 ___ people on earth.
o billion
o hundred million
o million
o trillion

Explanation:

The world - population is in the billions range. 7.7 billion is a common estimate for the current world population. 7.7 hundred million is 770 million which is too low, 7.7 million is extremely low, and 7.7 trillion is far too high.

Answer:

A. billion