The dioecious animal is

Options

A. Tape worm
B. Earthworm
C. Liver fluke
D. Aurelia.

Answer

To determine which of the given options represents a dioecious animal, we will follow these steps:

1. **Understand the Definition of Dioecious**: Dioecious animals are those in which male and female reproductive organs are found in separate individuals. This means that there are distinct male and female organisms.

2. **Differentiate from Monoecious**: In contrast, monoecious animals have both male and female reproductive organs within a single individual. Understanding this distinction is crucial for identifying dioecious organisms.

3. **Evaluate the Options**: We need to analyze the given options to identify which one is dioecious:
- **Tapeworm**: This organism is monoecious, as it has both male and female reproductive structures in one individual.
- **Earthworm**: Similar to tapeworms, earthworms are also monoecious, possessing both reproductive organs in a single body.
- **Liver Fluke**: This organism is also monoecious, having both male and female reproductive parts in one individual.
- **Aurelia**: This is a genus of jellyfish, and it is dioecious, meaning that male and female Aurelia are separate individuals.

4. **Select the Correct Answer**: Based on the evaluation, the only dioecious organism among the options is Aurelia.

Thus, the answer to the question "The dioecious animal is" is **Aurelia**.