Describe how energy flows through the ecosystem near oklahoma

Solar energy is transformed into carbohydrates, sugars and other materials through plants (everything from algae to Redwoods). Plants also put out oxygen from the CO2 they absorb. The carbon is used as a building block for the materails they make. The plants also "fix" an amount of nitrogen to nitrates and nitrites.

Animals eat the plants to absorb the produced molecules and breathe the oxygen. The animals create energy by "burning" the food in their cells. This becomes heat and electricity for nerve impulses.
The animals defecate and/or die providing food for scavengers and nutrients to plants.

Now for the exceptions ...
Deep under the oceans there are areas with volcanic vents (black smokers) which pump out sulfides and methane. Certain bacteria take the plants' job and use this source of energy and alternate oxidants to create proteins sugars and starches in an alternate manner. Bigger critters eat them and the situation reduces to the above case.