Which group of organisms is described as being unsegmented animals with a head, foot and visceral hump?

Explanation

To solve the question "Which group of organisms is described as being unsegmented animals with a head, foot, and visceral hump?", we can follow these steps:

### Step 1: Identify the Key Features
The question specifies that the organisms in question are unsegmented and possess three distinct parts: a head, a foot, and a visceral hump.

### Step 2: Recall Relevant Biological Groups
We need to think about the different groups of animals and see which group fits the description of having these features.

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