Why trihalides of group `13` elements fume in moist air?

Explanation

To understand why the trihalides of group 13 elements fume in moist air, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Identify the Group 13 Trihalides**:
- Group 13 elements include boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Their trihalides can be represented as MX₃, where M is the group 13 element and X is a halogen (F, Cl, Br, I).

2. **Understanding Hydrolysis**:
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