What are polymers ?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Polymers**:
- Polymers are large molecules made up of repeating structural units called monomers. These monomers are simple molecules that combine under specific conditions of temperature and pressure to form macromolecules.

2. **Monomers**:
- The individual building blocks of polymers are known as monomers. They are the simplest units that can join together to form a polymer.

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