Name two food materials which can be preserved by using sugar.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Role of Sugar in Preservation:**
- Sugar acts as a preservative by helping to maintain the texture and flavor of food. It also increases the shelf life of food materials.

2. **Identifying Food Materials Preserved by Sugar:**
- Two common food materials that can be preserved using sugar are:
- **Jams:** These are made by cooking fruits with sugar, which helps to create a gel-like consistency and extends their shelf life.
...