All animals which possess a spine are included in the same . 1. species
2. genus
3. phylum
4. class

Phylum

Explanation:

All vertebrate animals belong to a phylum which are also called  what i remember, Chordata.

Also, animals with a spine are also called vertebrate animals, so jellyfish and other spineless animals are not included as a vertebrate.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.