The science that describes populations is called gerontology psychology demography geography

We can identify which of the scientific studies describe population thru their definitions.

Gerontology is particular with old age, its process and the problems are encountered by old people.

Psychology studies the feeling, behavior, and mind of people, including all phenomena.

Demography shows the structure of human population, how it changes, based on the statistics of births, deaths, income, or occurrence of disease, the composition of a particular human population.

Geography is understanding of the Earth.  And it's complexities.

Correct answer then is demography.

the eggs of the insects should be the first thing collected at the scene.

false

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).