Detrital sedimentary rocks are mainly classified by the size of their grain. The largest grain is a boulder, followed by a cobble, a pebble, sand, silt and finally the finest grain, which is clay. These grains of sediments are what get cemented together to form sedimentary rocks.
The type of microscope described above is the <span>phase contrast microscope. This microscope can produce high contrast images useful when observing transparent objects like living cells, microorganisms or tissue samples.
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Answer:
Psychiatrist
Explanation:
A psychiatrist is a medical specialist who focuses on mental health issues, such as substance abuse. Psychiatrists are trained to evaluate both the mental and physical components of mental illnesses. I hope this helps and if it does a Brainliest would be nice!
It is referring to natural selection
