Interpersonal skills that determine your ability to initiate, develop, and maintain caring and productive relationships would primarily include:
- Validating others and being a harmoniser
- Respect and intentionality
- Trust, accurate communication and ability to resolve conflict
These skills contribute significantly to building strong, respectful relationships and fostering an environment of understanding and cooperation.
While being optimistic can be beneficial in interpersonal relationships, it is not necessarily a foundational skill for developing and maintaining them. Additionally, "showing support for the sake of gaining support" may not be considered a genuine interpersonal skill, as it implies a lack of authenticity or ulterior motives in relationships.
Thus, the first three options are the most relevant for effective interpersonal skills.