Define hybridisation.

Explanation

**Step-by-Step Solution:**

1. **Definition of Hybridization**: Hybridization is the process of interbreeding between two genetically different populations or species.

2. **Offspring Creation**: When two different species mate, the offspring produced from this mating is referred to as a hybrid.

3. **Examples of Hybridization**:
- **Animal Example**: A common example of hybridization in animals is the mating of a horse and a donkey, which produces a mule. Mules are hybrids that are typically sterile but are often used for labor due to their strength and endurance.
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