Meaning: There was no noise or movement in the forest.
Choice of Words:Silent means without any noise. Still means not moving.
Alternative Expressions
The forest was as quiet as a mouse.
Meaning: This means the forest was very quiet, like you could hear a mouse if it was there.
Choice of Words: A mouse is a very quiet animal. So, saying the forest was as quiet as a mouse means it was very quiet.
You could hear a pin drop in the forest.
Meaning: This means the forest was so quiet that you could hear the sound of a pin falling to the ground.
Choice of Words: A pin is a small, thin object. If you drop a pin, it makes a very soft sound. So, saying you could hear a pin drop in the forest means it was very quiet.