An essay is built up with 4 sentences
Our planet is named Earth,the planet elements are water,wind and land.
In every three hundred sixty-five days the earth revolves around the sun.
The Earth always have a breath taking view because of the people and animals living there.
The Earth is such a wonderful planet, it have some mysteries to be unlock but we can solve that mystery one step at a time.
Apparently, I made a basic essay :) you can use more sentences which you have to make.
Don't forget to use your pronouns,adjectives and etc. to make it interesting (=
hope this helps ^_^