E. growing and urbanizing populations needed to be fed
The thick layer is the-crust
Sedimentary rock changes or melts into magma due to high temperature. Sedimentary rock is a type of rock that has been formed due to the deposition and solidification of sediment. It is commonly deposited in layers and often contains fossils.
<u>Answer:</u>
Ptolemy accounted for 'retrograde motion' in his model of the solar system by introducing smaller circles named 'epicycles'.
<u>Explanation:</u>
- According to Ptolemy, the Sun and the other planets in the Solar system orbited around the Earth.
- The Greeks were convinced that Ptolemy's earlier model did not provide for backward or the retrograde motion.
- Ptolemy thought over it for a while and theorized the possibility of 'epicycles'.
- According to Ptolemy, the planets that orbited Earth also orbited another smaller point.
- The smaller orbits followed by the planets while in motion around the Earth in a larger orbit were introduced by Ptolemy as 'epicycles'.
- Until Kepler proposed his models of the functioning of the Solar system, Ptolemy's models were considered the most relevant.
Answer:
I believe that the answer is A, Lowering the population to protect resources and the environment.
