In how many of the following , primary succession will occur ?
( Abandoned farmland , newly created pond , bare rock burnt forest )

Options

A. Newly created ponds , bare rock , bandoned farmlands and burnt forests
B. Newly created ponds and bare rock
C. Abandoned farmlands , bare rocks and burnt forests
D. Bare rocks

Answer

To determine how many of the given environments will undergo primary succession, let's analyze each one:

1. **Abandoned Farmland**: This area was previously cultivated and had a thriving ecosystem. Even though it is now abandoned, the soil, seeds, and nutrients remain. Therefore, this will undergo **secondary succession**, not primary succession.

2. **Newly Created Pond**: This is a new habitat that has formed where there were no living organisms previously. It will require the gradual establishment of a biotic community from scratch. Hence, this will undergo **primary succession**.

3. **Bare Rock**: Similar to the newly created pond, bare rock represents an area where no soil or living organisms exist. The process of primary succession will occur here as well, starting with pioneer species that can colonize the rock and gradually lead to soil formation.

4. **Burnt Forest**: Although a forest has been destroyed by fire, the remnants of the previous ecosystem, such as soil, seeds, and nutrients, still exist. Therefore, this area will also undergo **secondary succession**.

Now, summarizing the findings:
- **Abandoned Farmland**: Secondary Succession
- **Newly Created Pond**: Primary Succession
- **Bare Rock**: Primary Succession
- **Burnt Forest**: Secondary Succession

Thus, the environments that will undergo primary succession are the **newly created pond and the bare rock**.

### Final Answer:
**2 environments will undergo primary succession.**