Presently A % of all mammal species and B % of all gymnosperm species in the world face threat of extiction.

Options

A. A -32, B -12
B. A -22, B -31
C. A-23 , B -31
D. A-31, B -23

Answer

To solve the question regarding the percentage of mammal species and gymnosperm species facing the threat of extinction, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Species in Question**: The question asks for the percentage of mammal species and gymnosperm species that are currently facing the threat of extinction.

2. **Recall Relevant Data**: From the video transcript, we note the following percentages:
- **Mammals**: 23% of mammal species are facing extinction.
- **Gymnosperms**: 31% of gymnosperm species are facing extinction.

3. **Assign Values to Variables**:
- Let A = percentage of mammal species facing extinction = 23%
- Let B = percentage of gymnosperm species facing extinction = 31%

4. **Choose the Correct Option**: Based on the given options:
- The correct pair of percentages is A = 23% and B = 31%.

5. **Conclusion**: Therefore, the answer to the question is:
- A = 23%
- B = 31%

### Final Answer:
- A = 23% (mammals)
- B = 31% (gymnosperms)