<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
The Euphrates river
Explanation:
Along with the Tigris, the Euphrates river helped form the Fertile Crescent and the Sumerian civilization.
It starts where the Karasu and Murat rivers merge in eastern Turkey and continues southeasterly for 2800 km (1740 mi) through Syria and Iraq until it merges with the Tigris river at Al-Qurnah. There, it becomes the Shatt al-Arab waterway and empties into the Persian Gulf.
I think the correct answer from the choices listed above is option D. The metamorphic rock that would most likely have formed at the highest temperatures and pressures would be phyllite. It <span>is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. </span>
Schist has the highest metamorphic grade.
I think reverential would be nice