List the four spheres of the earth and describe three examples of processes that represent an exchange of energy or matter between those spheres.

Four spheres of earth are:1)Lithosphere(land)  2)Hydrosphere(water) 3)Biosphere(living things) 4)Atmosphere(air).

Energy and matter flow through Earth's four spheres.Energy flows through the atmosphere and hydrosphere mostly by convection.The continuous cycling of matter and energy through earth's system makes life on earth possible .Others are driven by energy from the sun.

Explanation:

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the answer is "a.) well–developed vascular system."

explanation: