What will happen to the population of Yucca plants if the population of moths in that area decreases?

Options

A. The popoulation of Yucca plants will increase.
B. The population of Yucca plants will decrease.
C. The population of Yucca plants will remain same.
D. The population of Yucca plants will first increase and then decrease.

Answer

### Step-by-Step Solution:

1. **Understanding the Relationship**:
- The relationship between yucca plants and moths is mutualistic. This means that both species depend on each other for survival and benefit from their interactions.

2. **Role of Moths**:
- Moths provide essential pollination services for yucca plants. In return, yucca plants offer nectar as a food source for the moths.

3. **Impact of Decrease in Moth Population**:
- If the population of moths decreases, there will be fewer moths available to pollinate the yucca plants. This lack of pollination will hinder the yucca plants' ability to reproduce effectively.

4. **Consequences for Yucca Plants**:
- As a result of reduced pollination, the reproductive success of yucca plants will decline, leading to a decrease in their population over time.

5. **Evaluating Statements**:
- The first statement claims that the population of yucca plants will increase, which is incorrect.
- The second statement suggests that the population of yucca plants will decrease, which is correct.
- The third statement states that the population will remain the same, which is also incorrect.
- The fourth statement indicates that the population will first increase and then decrease, which is not supported by the mutualistic relationship.

6. **Conclusion**:
- The most accurate conclusion is that the population of yucca plants will decrease if the population of moths in that area decreases.

### Final Answer:
The population of yucca plants will decrease if the population of moths in that area decreases.

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