Fill in the following blanks with suitable words :
Feathers and furs keep birds and animals warm during cold weather because they have trapped __________in them.

Explanation

To solve the question, we need to fill in the blank in the sentence provided. The sentence is:

"Feathers and furs keep birds and animals warm during cold weather because they have trapped __________ in them."

### Step-by-Step Solution:

1. **Understand the Role of Feathers and Furs**:
- Feathers and furs are natural insulators. They help in retaining body heat, especially in cold weather.
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