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.
 
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Rattler
  
Meanings of difficult words:
  
Numbers
Words
Meanings
1.
FrighteningAfraid
2.
HarmlessNot able or likely to cause harm
3.
PoisonA substance that is capable of causing the illness or death of a living organism
4.
StrikeAttack
5.
RattleMove 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.