The earth is divided into four main layers: the solid crust on the outside, the mantel, the outer core and the inner core. out of them, the crust is the thinnest layer of the earth, amounting for less than 1% of our planet's volume. hope this helps!
Niches, trophic levels, and ecological processes of a biological community.
ANSWER
Mixture
Explanation: the air is composed of nitrogen and oxygen
...unless environmental changes occur. These probable environmental changes could influence the supply of food, the condition of shelter and the environment to sustain life and support the population.