Compared to early hominid ancestors modern humans have jaws that are what

Hello. This question is incomplete. The full question is:

"Compared to early hominid ancestors, modern humans have jaws that are . A) larger and less rounded.  B) larger and more rounded.  C) smaller and less rounded.  D) smaller and more rounded."

C. Smaller and less rounded.

Explanation:

Hominids were great bipedal primates that are characterized as ancestors of modern humans. Despite being 97% similar to modern humans, some physical and intellectual differences can be pointed out.

Firstly, the brain of these ancestors was less developed than the brain that we present now and that is why the human being may have a greater cognitive and intellectual capacity than his ancestors. There are also some physical differences, the most striking, however, is the difference between the jaws of human beings and hominid ancestors. While hominid ancestors had more prominent, developed and larger jaws, humans have smaller and less rounded jaws.

answer; i believe the correct answer is (a)0

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.