Vivipary automatically limits the number of offspring in a litter. How?

Explanation

### Step-by-Step Solution:

1. **Understanding Vivipary**:
- Vivipary is a mode of seed germination where seeds germinate while still attached to the parent plant. This means that the seed begins to grow before it has fallen off the parent plant.

2. **Context of Vivipary**:
- This phenomenon is commonly observed in mangrove forests, where the environmental conditions, particularly soil salinity, are harsh for seedling survival.

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