What are polymers ? Why are they called macromolecues ?

Explanation

### Step-by-Step Solution:

**Step 1: Define Polymers**
- Polymers are large molecules that are made up of repeating structural units called monomers. These monomers are smaller, simpler molecules that bond together in a chain-like fashion to form the larger polymer.

**Step 2: Explain the Structure of Polymers**
- Just like a building is constructed using many small bricks, polymers are constructed from many small monomers. The process of linking these monomers together is known as polymerization.

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