Migration is

Options

A. Outward movement of individuals
B. Inward movement of individuals
C. Two -way departure and return of all the individuals
D. Starvation bassed mortality

Answer

**Step-by-Step Solution:**

1. **Understanding Migration**: Begin by defining what migration means in the context of animals. Migration refers to the seasonal movement of animals from one habitat to another.

2. **Reasons for Migration**: Identify the primary reasons why animals migrate. The main reasons include:
- Searching for food.
- Seeking better environmental conditions (e.g., warmer climates).
- Reproductive needs (e.g., spawning).

3. **Examples of Migrating Animals**: Discuss various species that migrate. This includes fish, crustaceans, amphibians, reptiles, insects, and mammals.

4. **Characteristics of Migration**: Highlight the two key characteristics that distinguish migration from other types of animal movement:
- It occurs seasonally.
- It involves a return journey to the original habitat.

5. **Evaluating the Options**: Analyze the provided options in the question:
- Option 1: Outward movement of individuals (Incorrect).
- Option 2: Inward movement of individuals (Incorrect).
- Option 3: Two-way departure and return of all individuals (Correct).
- Option 4: Starvation, waste, mortality (Incorrect).

6. **Conclusion**: Based on the analysis, conclude that the correct answer to the question "Migration is" is option three: "two-way departure and return of all the individuals."

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