Zero growth of population is indicated by

Options

A. less number of child birth
B. less number of reproductive females
C. reproductive individual are equal to pre-reproductive individuals
D. less number of male then females

Answer

To determine what indicates zero growth of a population, we need to analyze the options provided in the question step by step.

### Step 1: Understand Zero Growth of Population
Zero growth in a population occurs when the number of births (natality) is equal to the number of deaths (mortality). This means that the population size remains constant over time.

### Step 2: Analyze Each Option
1. **Less number of child births**: If there are fewer births, this could lead to a decrease in population size, not zero growth.

2. **Less number of reproductive females**: Fewer reproductive females would lead to fewer births, which could contribute to a decline in population size, not zero growth.

3. **Reproductive individuals are equal to pre-reproductive individuals**: This suggests a balance in the population structure, but it does not directly indicate zero growth. It could lead to stability, but it does not guarantee that births equal deaths.

4. **Less number of males than females**: The ratio of males to females does not directly indicate zero growth. A population can still grow or decline regardless of this ratio.

### Step 3: Identify the Correct Option
The correct indication of zero growth in a population is when the reproductive individuals (those capable of giving birth) are equal to the pre-reproductive individuals (those who are not yet capable of reproduction). This balance suggests that the population can sustain itself without increasing or decreasing.

### Conclusion
Thus, the correct answer is **Option 3: Reproductive individuals are equal to pre-reproductive individuals**.

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