The structure of proteins is complex and unique, and only specific molecules can interact with their surface features. When proteins are exposed to heat, acid, or alcohol, their shape is disrupted, and they become nonfunctional .

Denatured.

Explanation:

The structure of proteins is complex and unique, and only specific molecules can interact with their surface features. When proteins are exposed to heat, acid, or alcohol, their shape is disrupted, and they become nonfunctional or denatured.

Denaturation start in proteins when it is exposed to heat. Each protein has its own unique shape. It has primary, secondary and tertiary structures. Denaturation occurs in the tertiary and secondary structures. Denaturation is the process by which a protein loses its shape and structure. Denaturation tends to protein inactivity, in cases it cause the cell to die and no longer being in function. As heat cause protein to denature, it disrupts the bonds due to the rapid vibrations that it causes in these molecules.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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.