Arrange hydroxides of group `2` elements in order of increasing basicity.

Explanation

To arrange the hydroxides of group 2 elements in order of increasing basicity, we will consider the hydroxides of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba).

### Step-by-Step Solution:

1. **Identify the Group 2 Hydroxides**:
The hydroxides of group 2 elements are:
- Beryllium hydroxide (Be(OH)₂)
- Magnesium hydroxide (Mg(OH)₂)
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