Answer:
A vertebrate is anything with a backbone. Mammals, Amphibians, Reptiles, Birds, and some fish. These organisms with a backbone would be categorized as Phylum Chordata. (Chordates, meaning chord, or spinal chord).
Explanation:
Does you question have the following choices?
A) The density of the pebbles and sand would decrease.
B) The rock would become a plutonic rock composed mostly of quartz.
C) The rock would become more felsic with a higher concentration of magnesium.
D) The pebbles would become distorted and the sand would be recrystallized.
If so, then the answer is letter D.
> The change that would most likely to occur if this rock became buried deep within Earth’s crust and was subjected to intense heat and pressure, but did not melt is: The pebbles would become distorted and the sand would be recrystallized.