User:Jeyaraina

Work and energy

All living beings need fod. Living beings have to peform several basi activities to survive. We call such activities as life process. The energy for these processes comes from food. We need energy for athor activities like playing, running, singing, and cycling. Activities that are strenous require more energy.

Animals too get engaged in activities. For example they may jump and run. They have to fight, move away from enemies, find food or find a safe place to live. Also we engage some animals to lift weighs, carry loads, pull carts or plough fields. All such activities need energy.