The first volume of the fifth grade unit 5 exercises introduce a thing. How to write an explanatory article?

The essay in Unit 5 of the first volume of the fifth grade introduces such a thing:

In ancient Greece, mantis was called mantis. Because people often see it semi-upright, standing on the grass, its front legs reaching into the sky like arms, as if praying.

In fact, this is all wet! Those hands are actually a sharp knife. When praying, if some jumping insects suddenly pass by it, it will inevitably show its murder. Its body suddenly spread out, grabbed two sharp knives and pounced on them. After being caught by a sharp knife, he couldn't move and could only be eaten by mantis.

There are many kinds of mantis, such as China mantis, orchid mantis and yellow mantis ... Now let's talk about mantis. Its body is very big, and its color is brown or tender green. As long as you lie on a green branch, it is easy to hide and blend in with the feeling of the branch. Not only can you avoid natural enemies, but you can also suddenly attack and attack prey. They generally feed on mosquitoes, flies and cicadas.