How do plants influence the uptake of cations such as magnesium involving cation exchange?

The soil cations are essential for plant growth. It is enabled by cation exchange.

Dihydrogen monoxide or simply water in soil reacts with carbon dioxide and produce carbonic acid. The carbonic acid releases protons. This cation exchange is compelled by the release of carbon dioxide by root cells.

answer///multiple alleles;

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.