Final answer:
Psychologists refer to the emotional bonds developed with those we feel closest to as 'attachment.' Attachment theory, as developed by John Bowlby, underscores the importance of secure emotional bonds from infancy, which affect our relationships throughout life.
Step-by-step explanation:
Psychologists use the term attachment to refer to the emotional bonds we develop with those to whom we feel closest. This concept is essential in understanding our interpersonal relationships and social development. British psychologist John Bowlby was instrumental in the development of attachment theory, which emphasizes the importance of a secure base provided by primary caregivers for normal social and emotional development in infancy. Such attachments can last a lifetime, influencing relationships not only with other humans but also with non-human animals and even inanimate objects. Proximity is often the most influential factor in who we form attachments with, such as friends or romantic partners. A family, as a socially recognized group joined by blood, marriage, or adoption, typically forms strong ties and can also be considered a fundamental source of emotional connection and support.