Which of the following is correct?

Options

A. Natural selection is not the basis for evolutionary change
B. Natural selection discriminates variations
C. Natural selection is essential for evolution
D. None of the above

Answer

To solve the question, "Which of the following is correct?", we need to analyze each of the given statements regarding natural selection and its role in evolution.

### Step-by-Step Solution:

1. **Evaluate Option 1**:
- The statement claims that "natural selection is not the basis for evolutionary change."
- This is incorrect because natural selection is indeed a fundamental mechanism of evolution. It drives the process by which certain traits become more common in a population due to their advantageous effects on survival and reproduction.

**Hint**: Remember that natural selection is a key mechanism in the theory of evolution.

2. **Evaluate Option 2**:
- This statement suggests that "natural selection discriminates variation."
- This is also incorrect. Natural selection does not discriminate against variation; rather, it acts on existing variations within a population, favoring those that provide a survival advantage.

**Hint**: Consider how natural selection interacts with genetic variation in a population.

3. **Evaluate Option 3**:
- The statement asserts that "natural selection is essential for evolution."
- This is correct. Natural selection is one of the primary mechanisms that drive evolutionary change by favoring the survival and reproduction of individuals with advantageous traits.

**Hint**: Think about the role of natural selection in shaping the characteristics of populations over time.

4. **Evaluate Option 4**:
- This option is not specified in detail, but it is indicated that it is also incorrect.
- Without specific details, we can assume it does not accurately represent the role of natural selection in evolution.

**Hint**: Review the fundamental concepts of evolution to assess the validity of statements regarding natural selection.

### Conclusion:
After evaluating all options, the correct answer is **Option 3: Natural selection is essential for evolution.**