Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days low calorie drinks are more popular, why ?

Explanation

### Step-by-Step Solution:

1. **Understanding Sugar as an Energy Source**:
- Sugar, primarily in the form of sucrose, is a carbohydrate that serves as a significant source of energy for the body. It undergoes metabolic decomposition to release energy.

2. **Rising Popularity of Low-Calorie Drinks**:
- Despite sugar being a primary energy source, low-calorie drinks have gained popularity. This shift is largely due to health concerns associated with high sugar intake.

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