What is the definition of the term 'explicate'?

The term 'explicate' fundamentally means to make something plain or clear, especially in the context of explaining or interpreting something in detail. When one explicates a concept, they are breaking it down to enhance understanding, often by elucidating complexities or nuances. This aligns directly with the definition you identified as the correct choice, emphasizing clarity and thorough explanation.

In contrast, the other terms provided do not capture the essence of this meaning. Adapting to change refers to the ability to adjust or modify oneself in response to new conditions, which is unrelated to the act of clarifying. Causing a quarrel deals with provoking conflict or disagreement, which is distinctly different from the idea of explanation or clarity. Lastly, being self-satisfied pertains to a sense of contentment with one's own situation or accomplishments, which again does not connect to the act of making something clear. Thus, 'explicate' fittingly aligns with the notion of providing clear understanding, making your selected answer the most appropriate one.