Evolution is

Options

A. development of organisms through time
B. history and development of race along with variations
C. hisory of race
D. development of race

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Evolution**: Evolution is the study of the different forms of life, their features, and the changes that occur over several generations. It encompasses how species adapt and change over time.

2. **Scientific Theory**: Evolution is a scientific theory used by biologists to understand genetic variation within populations. This theory helps explain the diversity of life on Earth.

3. **Origins of Life**: There are various theories regarding the origin of life on Earth. The theory of evolution posits that all species are interconnected and have evolved progressively over time.

4. **Mechanisms of Evolution**: Evolution occurs due to several mechanisms, including mutation (changes in DNA), genetic recombination (mixing of genes during reproduction), and genetic variation (differences among individuals in a population).

5. **Natural Selection**: The theory of evolution by natural selection was independently proposed by Charles Darwin and Alfred Russel Wallace in the mid-19th century. Darwin detailed this theory in his book "On the Origin of Species."

6. **Correct Answer**: Among the options provided, the correct answer to the question "Evolution is" is "development of organisms through time." This emphasizes the continuous change and adaptation of organisms over generations.

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