**Core Concept**
Adoptive immunity refers to the transfer of immune cells from one individual to another, resulting in the recipient acquiring specific immune responses. This concept is crucial in immunology, as it allows for the study of immune responses in a controlled manner and has significant implications for the treatment of various diseases.

**Why the Correct Answer is Right**
Adoptive immunity is primarily achieved through the transfer of T lymphocytes, which recognize and respond to specific antigens. This process involves the recognition of antigens by T cell receptors, activation of T cells, and the subsequent proliferation and differentiation of these cells to produce effector functions. The transferred T cells can then recognize and eliminate infected cells or produce cytokines to coordinate the immune response.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because adoptive immunity is not solely achieved through the transfer of antibodies. Antibodies are a product of the humoral immune response, which is a different mechanism of immunity.

**Option B:** This option is incorrect because passive immunity involves the transfer of pre-formed antibodies from one individual to another, rather than the transfer of immune cells.

**Option C:** This option is incorrect because innate immunity refers to the non-specific defense mechanisms that are present in all individuals, such as the skin and mucous membranes.

**Clinical Pearl / High-Yield Fact**
One key aspect of adoptive immunity is that it can provide long-term protection against specific diseases, making it a promising approach for the treatment of various immunodeficiencies and cancers.

**Correct Answer:** C.