Existing rocks are buried and forced toward the mantie, increasing heat and pressure. this is the first step in the formation
of metamorphic rocks.
which best describes the next step in the formation of metamorphic rocks?
buried rocks melt deep within the mantle.
lava melts u rlying rocks, which crystallize into new minerals.
rocks that were buried are exposed at earth's surface, where they are weathered and eroded.
magma pockets rise, which increases heat, and minerals change due to temperature and pressure.

Option B, Lava melts u rlying rocks, which crystallize into new minerals.

Explanation:

Metamorphic rocks are the formed when the alternating heat and pressure are applied on an existing sedimentary or igneous rock. In the first step, a rock is forced down to reach the level of mantle where it experiences high temperature and pressure due to which it recrystallizes. Along with temperature and pressure, physical processes such as tectonic plate shifting and compression forces with in the rocks also compresses the rock into smaller volumes thereby making it more compact and dense. Therefore, all metamorphic rocks are denser than their original parent rock.  

Hence, the second step is option B

a. the production of carbon dioxide through the process of photosynthesis

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

read more on -

explanation: