Which best describes the age structure of a population with zero population growth? 4
the majority of people are of prereproductive ages in a broad-base pyramid age structure diagram.

the age-structure diagram would be narrow at the bottom and top with a broader middle.

the age structure would be broad at the top in postreproductive ages and narrow downward in an inverted pyramid.

the age-structure diagram would be column-shaped with all age classes approximately equal.

4

The majority of people are of pre-reproductive ages in a broad-base pyramid age structure diagram.

Explanation:

Disease is density-dependent because transmission occurs more easily when a population is large & crowded

The age-structure diagram would be column-shaped with all age classes approximately equal.

Explanation:

Zero population growth is when a certain population (within a city or country) does not grow or decline. It is considered by others as a way to reach a stable environmental and economic status, thereby stabilize the country's growth.

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.