In logistic growth pattern `((K-N)/(K))` is :-

Options

A. Carring capacity
B. Intrinsic rate of natural increase
C. environmental resistance
D. Biotic potential and environmental resistance

Answer

To solve the question regarding the logistic growth pattern represented by the expression \((K-N)/K\), we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Variables**:
- In the logistic growth model, \(K\) represents the carrying capacity of the environment, which is the maximum population size that the environment can sustain indefinitely.
- \(N\) represents the current population size.

2. **Analyzing the Expression**:
- The expression \((K-N)/K\) can be interpreted as the proportion of the carrying capacity that is still available for the population to grow.
- When \(N\) is much smaller than \(K\), \((K-N)\) is large, and thus \((K-N)/K\) approaches 1, indicating that there is a lot of room for population growth.
- As \(N\) approaches \(K\), \((K-N)\) becomes smaller, and \((K-N)/K\) approaches 0, indicating that the population is nearing the carrying capacity and growth will slow down.

3. **Identifying the Concept**:
- The expression \((K-N)/K\) reflects the environmental resistance faced by the population. Environmental resistance includes all the factors that limit population growth, such as food availability, predation, disease, and competition.
- Therefore, this expression indicates how much of the carrying capacity is not yet utilized by the population, which directly relates to the environmental resistance.

4. **Conclusion**:
- Based on the explanation above, the correct answer to the question is that \((K-N)/K\) represents **environmental resistance**.

### Final Answer:
The correct option is **3rd: Environmental Resistance**.