### Theory:

There are more than 2300 different kinds of snakes around the world, ranging from just fifteen centimetres long to more than eleven metres. Most snakes are quite harmless — but there are a few that are so poisonous they can kill a human being with just one bite. Most snakes lay eggs, but there are many which give birth to their young. In the dry, rocky deserts of America lives a rather evil-looking snake with a very bad reputation. Its frightening rattle can be heard as far as thirty metres away, and it can strike with lightning speed.
Explanation:

More than $$2300$$ snakes are known to exist, from fifteen centimeters to eleven metres long. Some of the snakes are non-poisonous, a snake with venom can kill a human being in a single bite. Moreover, snakes can lay eggs, and some will give birth to their young. It has a frightening look, and it is considered as a dangerous animal. They are found in the rocky deserts of America. The rattle or rattlesnakes could be heard thirty meters away, and they can strike at the speed of lightning.

Rattler

Meanings of difficult words:

 Numbers Words Meanings 1. Frightening Afraid 2. Harmless Not able or likely to cause harm 3. Poison A substance that is capable of causing the illness or death of a living organism 4. Strike Attack 5. Rattle Move or travel with a sharp knocking sound
Reference:
National Council of Educational Research and Training (2006). Honeysuckle. Desert Animals (pp. 112-120). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.