Due to interference of pathogen in normal vital activities results:-

Answer

### Step-by-Step Solution:

1. **Understanding Pathogens**:
- Pathogens are microorganisms that cause diseases. They include bacteria, viruses, fungi, and parasites.
- They can enter the human body through various routes such as ingestion, inhalation, or through breaks in the skin.

2. **Impact on Vital Activities**:
- Once inside the body, pathogens can interfere with normal vital activities. This interference can disrupt processes such as metabolism, immune response, and cellular functions.

3. **Consequences of Pathogen Interference**:
- The interference leads to a decline in health. This can manifest as symptoms of disease, which may include fever, fatigue, inflammation, and other signs of infection.

4. **Morphological and Functional Damage**:
- The presence of pathogens can cause both morphological (structural) and functional (operational) damage to cells and tissues.
- Morphological damage may involve changes in cell shape, size, or structure, while functional damage affects how well cells and organs perform their roles.

5. **Conclusion**:
- Therefore, the correct answer to the question is that due to the interference of pathogens in normal vital activities, there results in morphological and functional damage.

### Final Answer:
Due to interference of pathogens in normal vital activities results in morphological and functional damage.

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