The emotional aspect of attitude is referred to as the Affective component. It involves the feelings or emotions a person has towards an object, person, or idea. The affective component influences how one feels about a particular object, whether it is positive or negative, and this emotional response is a key part of attitude formation.
Step 1: Analyze the options.
(A) Cognitive: The cognitive component of attitude refers to the beliefs or thoughts that people hold about an object or subject, not the emotional aspect.
(B) Affective: This is the correct answer. The affective component is the emotional or feeling-based aspect of attitude.
(C) Values: Values are deeply held beliefs, but they are not strictly emotional in nature. Values shape attitudes but are not the same as the affective component.
(D) Behavioural: The behavioral component refers to the way a person acts or behaves toward an object or idea, not the emotional aspect.
Step 2: Conclusion.
The emotional aspect of attitude is best described by the affective component, making (B) the correct answer.
Final Answer:
\[
\boxed{(B) \, \text{Affective}}
\]