Almost
all energy comes from the sun which warms our planet and makes plants
grow.
Plants
are smart because they can use the sun’s energy not only to make
them grow, but also to make energy stores.
Most
plants make seeds, some of which grow into new plants. And animals
like you humans eat them - you know, wheat seeds which you make into bread;
maize into popcorn or cornflakes and so on. This means you get your
energy from eating plants, or by eating other animals like cows
which have fed off plants.
I
get my energy from eating fish...
...which
ate smaller fish which ate shrimpy things...