(B) Two thin blankets are usually warmer than one thick blanket because air is trapped between them. Air is a bad conductor of heat. This trapped laye

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$A$ layer of air is formed between these two blankets,which is a bad conductor

(B) Two thin blankets are usually warmer than one thick blanket because air is trapped between them. Air is a bad conductor of heat. This trapped layer of air prevents the transfer of heat from our body to the surroundings,thereby keeping us warmer.

Class 11 Physics 2 Thermal Properties of Matter: Heat Transfer Basic of Heat Transfer and Conduction

Easy

Two thin blankets keep more warmth than one blanket of thickness equal to these two. The reason is

A
Their surface area increases
B
$A$ layer of air is formed between these two blankets,which is a bad conductor
C
These have more wool
D
They absorb more heat from outside