The equation `(Dleta N_B)/(Delta N_A) = B represents which of the following?

Options

A. Natality
B. Growth rate
C. Mortality
D. All of these

Answer

To solve the question regarding the equation \((\Delta N_B)/(\Delta N_A) = B\), we need to understand what the variables and terms in the equation represent.

### Step-by-Step Solution:

1. **Identify the Variables**:
- In the equation, \(\Delta N_B\) represents the change in the population size due to births (natality).
- \(\Delta N_A\) represents the change in the population size over a certain time period.
- \(B\) is a constant that represents the birth rate.

2. **Understand the Concept of Natality**:
- Natality refers to the birth rate of a population, which is a key factor in population growth. It indicates how many individuals are born in a given time period.

3. **Analyze the Equation**:
- The equation \((\Delta N_B)/(\Delta N_A) = B\) essentially states that the change in population size due to births is proportional to the overall change in population size, with \(B\) being the proportionality constant (the birth rate).

4. **Determine the Correct Option**:
- Given the options:
- a) Natality
- b) Growth rate
- c) Mortality
- d) All of these
- Since \(B\) specifically represents the birth rate (natality), the correct answer is option a) Natality.

### Final Answer:
The equation \((\Delta N_B)/(\Delta N_A) = B\) represents **Natality**.