I am the farmer and I plant the seeds into the ground which is mechanical energy.
The mechanical energy of the farmers work helps speed along the process of the sun, rain, and air which helps the trees grow. this energy is stored in the plant which is chemical energy.
As the cow eats the plant that was produced from the chemical energy it gained from the rain, sun, and air. the cow stores that energy into stored chemical energy to have for later.
The cow digests his food turning it into stored chemical energy.
the cow finishes his digestive process and now excretes his feces onto the earth which is a form of mechanical energy.
The cows feces then is used as fertilizer for the baby trees then the plants uses the stored chemical energy from the fertilizer to grow into a big strong orange tree which becomes total mechanical energy.