An ecosystem
a. is composed of the plant life and climate of a given area.
b. consists of all of the living animals in a given area.
c. consists of all of the living organisms in a given area.
d. is composed of all of the abiotic factors that influence living organisms in a given area.
e. consists of all of the living and non-living things functioning together in an area.

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.