Final answer:
A healthy relationship is characterized by effective communication, trust, respect, and mutual support, which all contribute to a strong partnership.
Step-by-step explanation:
Four characteristics that define a healthy relationship include communication, trust, respect, and support. Good communication is essential for expressing feelings, resolving conflicts, and sharing joys and concerns. Trust builds a foundation for safety and security in a relationship, allowing individuals to feel confident in sharing their thoughts, feelings, and selves. Respect is crucial for maintaining individuality and equality within the relationship, acknowledging each person's worth and boundaries. Lastly, support involves offering encouragement and assistance to one another, fostering personal growth and a sense of partnership in both challenging and successful times.