Which of the following features is common to all animals without any exception?

Options

A. Locomotion
B. Specialised nervous system
C. Multicellularity
D. Herbivorous mode of nutrition

Explanation

To determine which feature is common to all animals without any exception, we can analyze the options provided:

1. **Locomotion**: This refers to the ability of an organism to move actively and consume energy in the process. All animals exhibit some form of locomotion, whether it is through walking, swimming, flying, or crawling. This feature is indeed common to all animals.

2. **Specialized Nervous System**: While many animals possess a specialized nervous system, it is not universal to all animals. For instance, simpler organisms like sponges do not have a nervous system at all. Therefore, this feature cannot be considered common to all animals.

3. **Multicellularity**: While most animals are multicellular, there are unicellular organisms (like certain protozoans) that are classified as animals in some contexts. Thus, multicellularity is not a feature common to all animals.

4. **Herbivorous Mode of Nutrition**: Animals exhibit various modes of nutrition, including herbivorous, carnivorous, omnivorous, and more. Therefore, this feature is also not common to all animals.

Based on this analysis, the only feature that is common to all animals without exception is **locomotion**.

### Step-by-Step Solution:
1. **Identify the Features**: List the features provided in the question: locomotion, specialized nervous system, multicellularity, and herbivorous mode of nutrition.

2. **Analyze Each Feature**:
- **Locomotion**: Confirm that all animals exhibit some form of movement.
- **Specialized Nervous System**: Note that not all animals have a nervous system.
- **Multicellularity**: Recognize that some animals are unicellular.
- **Herbivorous Mode of Nutrition**: Understand that animals have various nutritional modes.

3. **Determine the Common Feature**: Conclude that locomotion is the only feature that applies to all animals.

4. **Final Answer**: State that the common feature to all animals is locomotion.