From what I have researched online, I found that there were around 562 tribes at the time of european arrival.
The basic principals of Uniformitarianism were enough to give geologists a sequencial history of the earth but absolute dating using isotope data from igneous rocks gathered using several different techniques (strontium/rubidium, parent/daughter isotope decay rates) and with the combination of these two geologists were able to develop the geological time scale.
Answer:
always lose some energy as heat
Explanation:
The answer would be answer choice b