Amajor feature in many insulating materials is a. trapped air b. thick metal c. high density

Option (a)

Explanation:

There are two types of materials.

1. Conducting materials: The materials which allows the heat or electricity to pass through it are called conducting materials.

For example, iron, copper, silver, etc.

2. Insulating materials: The materials which do not allow the heat or electricity to pass through it are called insulating materials.

For example, rubber, plastic, air, etc.

The air trapped between two layers works as an insulator.

the assestment will probley apele with cause and effect

cant without the picture! ?