What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic? Justify your answer.

Explanation

### Step-by-Step Solution:

1. **Understanding Ferromagnetic Substances**:
- Ferromagnetic substances have tiny magnetic regions called domains. In an unmagnetized state, these domains are randomly oriented, resulting in no net magnetization.
- When exposed to a strong magnetic field, the domains align in the direction of the field, which causes the material to become magnetized.

2. **Behavior of Ferromagnetic Substances**:
- Once the external magnetic field is removed, the domains in ferromagnetic materials tend to remain aligned due to strong interactions between them. This results in a permanent magnet that retains its magnetization.
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