Final answer:
Emotional intelligence is the ability to manage one's own emotions and to understand and navigate the emotions and social interactions of others, a key component in managing ourselves and our relationships effectively.
Step-by-step explanation:
The ability to manage ourselves and our relationships effectively is defined by emotional intelligence. While communication skills are integral for conveying information and interacting with others, and are indeed valuable in many professions including engineering, it is emotional intelligence that encompasses the ability to understand and manage your own emotions as well as to comprehend and navigate the emotions and social cues of others. High emotional intelligence leads to well-developed social skills and can contribute to success beyond what traditional IQ measures can predict, as detailed by researchers like Daniel Goleman.