Population density is the number of individuals per unit area.

Explanation:

The population density of an area is a demographic tool used to measure the number of organisms or individuals in a particular area.

 It is expressed as;

    Population density  =  

The unit is expressed as organisms/km²

An area with a high population density is often not desirable as it can lead to pressure on amenities and infrastructure.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.