Which flatworms possess hooks and suckers in the body?

Explanation

### Step-by-Step Solution:

1. **Identify the Phylum**: The question pertains to flatworms, which belong to the phylum **Platyhelminthes**.

2. **Understand the Types of Flatworms**: Within Platyhelminthes, there are various types of flatworms, including both free-living and parasitic forms. The focus here is on the parasitic flatworms.

3. **Identify Parasitic Flatworms**: The most common parasitic flatworms are **tapeworms** (class Cestoda) and **liver flukes** (class Trematoda).

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