Which of the following is not a basic feature of all animals?

Options

A. Heterotrophism
B. Aquatic habitat and neurosensory body control
C. Multicellularity
D. Holozoic mode of nutrition

Explanation

To determine which of the following is not a basic feature of all animals, we will analyze the characteristics provided in the question.

### Step 1: Understand the Basic Features of Animals
Animals are characterized by several basic features, which include:
- Multicellularity
- Heterotrophic mode of nutrition
- Holozoic mode of nutrition
- Nervous system and sensory organs (in higher animals)

### Step 2: Analyze Each Option
1. **Heterotrophism**: This is the ability to obtain organic matter from other organisms. All animals are heterotrophs, as they cannot produce their own food.

2. **Aquatic Habitat**: Not all animals live in aquatic habitats. Many animals are terrestrial (land-dwelling). Therefore, this is not a universal feature of all animals.

3. **Neurosensory Body Control**: This feature is present in higher animals but is not a characteristic of all animals, especially the simpler or lower organisms.

4. **Multicellularity**: Most animals are multicellular, with the exception of a few unicellular organisms like certain protozoa.

5. **Holozoic Mode of Nutrition**: This refers to the ingestion of food and its subsequent digestion within the body, which is a characteristic of most animals.

### Step 3: Identify the Incorrect Feature
From the analysis:
- Aquatic habitat is not a basic feature of all animals since many animals live on land.
- Neurosensory body control is also not a feature of all animals, as it is mainly seen in more complex organisms.

### Conclusion
The correct answer to the question "Which of the following is not a basic feature of all animals?" is **Aquatic Habitat**.

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