Birds are able to recognize their home through
(a) Memory
(b) Smell
(c) Orientation of magnetic field
(d) Eye sight

Options

A. Memory
B. Smell
C. Orientation of magnetic field
D. Eye sight

Answer

To solve the question "Birds are able to recognize their home through", we will analyze each option provided:

1. **Option A: Memory**
- While birds do have good memory, especially migratory birds that remember their routes, memory alone does not fully explain how they navigate back home over long distances.

2. **Option B: Smell**
- Some studies suggest that certain bird species can use their sense of smell to locate their home or food, but this is not the primary method for most birds when it comes to long-distance navigation.

3. **Option C: Orientation of magnetic field**
- This is a well-supported explanation for how many birds navigate. Birds have specialized cells that can detect the Earth's magnetic field, allowing them to orient themselves and find their way home. This ability is thought to involve quantum mechanics and the interaction of light with their eyes, which helps them sense the magnetic field.

4. **Option D: Eye sight**
- While eyesight is crucial for birds to navigate their environment and recognize landmarks, it is not the primary method they use to find their way home over long distances.

Given this analysis, the best answer is:

**Correct Answer: (c) Orientation of magnetic field**