Human liver fluke is a `ul(A)` which depends on two intermediate hosts `ul(B)`.

Answer

**Step-by-Step Text Solution:**

1. **Identify the Organism**: The human liver fluke is a type of organism that is known to infect humans and is associated with liver and bile duct diseases.

2. **Determine the Type of Organism**: The human liver fluke is classified as a parasite. Parasites are organisms that live on or in a host and benefit at the host's expense.

3. **Understand the Life Cycle**: The life cycle of the human liver fluke involves multiple hosts. Specifically, it is a digenetic parasite, meaning it requires two different intermediate hosts to complete its life cycle.

4. **Identify the Intermediate Hosts**: For the human liver fluke, the two intermediate hosts are:
- **Snail**: This is the first intermediate host where the larval stage of the fluke develops.
- **Ant**: This is the second intermediate host that further facilitates the development of the fluke before it reaches its final host, which is typically a human.

5. **Fill in the Blanks**: Based on the information gathered:
- For `ul(A)`, the answer is **parasite**.
- For `ul(B)`, the answer is **snail and ant**.

**Final Answer**: Human liver fluke is a **parasite** which depends on two intermediate hosts: **snail and ant**.

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