Theory:

Meaning of difficult words from the lesson "What Happened to the Reptiles":
 
S. No.
Words
Meaning
1.
Cliff
A high area of a rock, often at the end of the sea or ocean
2.
Mossy
Covers like small green or yellow plant that spreads over wet surfaces, rocks, trees, etc.
3.
Terrible
Something that makes you get shocked or upset
4.
Grab
To take something suddenly using your hand
5.
Strangers
Someone who did not know before
6.
Heal
To make something healthy again
7.
Wound
Any injury that occurs in our body
8.
Sores
A cut or weakened area of the body which takes time to heal
9.
Anxious
Being worried and nervous
10
Reptiles
Animals that have cold-blood, skin covered in scales and lay eggs
11.
Engulfed
To surround or cover something
12.
Devastating
Something that destroys or which causes damage
13.
Riots
Refers to a violent situation involving a group of people