Step 1: Understanding the term.
In biology, differences observed among individuals of the same species or between parents and their offspring are an important concept related to evolution and adaptation.
Step 2: Explanation of variation.
Variations refer to the differences in characteristics such as height, color, shape, or behavior among individuals. These differences may arise due to genetic recombination or environmental factors.
Step 3: Analysis of options.
(A) Heredity: Incorrect — heredity refers to transmission of traits, not differences.
(B) Allelism: Incorrect — it refers to the presence of alternative forms of a gene.
(C) Variations: Correct — it directly refers to differences among individuals.
(D) Homology: Incorrect — it refers to similarity due to common ancestry.
Step 4: Conclusion.
The differences among individuals of the same species are called variations.