The answer should me d if I’m not mistaken
The Proterozoic division of the geological time scale is an era of the Phanerozoic eon. The Proterozoic division began 2.5 billion years ago and ended 542.0 million years ago.
Physical hunger shows itself with physical feelings of emptiness in your stomach, rumbling accompanied by weakness. Psychological hunger is simply the desire to eat, accompanied by no physical proof that it is necessary at that moment.
