Answer:
About 0.1 to 0.2%
Explanation:
The geological time scale can be defined as the arrangement of major events that has taken place on earth, right from the time of formation of the earth, which is about 4.6 billion years back.
According to this time scale, the humans have appeared in the Cenozoic era, some 7 million years back from the present. This is comparatively very recent.
So, from this, it can be concluded that the humans have been on earth for about 0.1 to 0.2% of the total geological time scale.
Liquid water is not stable on Mars but was stable in the past because Mars' atmosphere was thicker, trapping carbon-dioxide easily, warming the planet, making water stable. But the atmosphere dissolved, making Mars colder, so now liquid water is not stable.
The correct answer is D.) Hunters and Gatherers .
My reason being is because this is how they got their food.
This was there whole living situations.
I really hope that this helps you .