Answer :
"The factor which has no effect on a child's attachment security at age 1 is A. whether the primary caregiver is a mom or dad."
"Insecurity due to attachment ways are usually caused by mismatched parenting, trauma, or lack of attention. They result in building negative affect on child's mental health, behavior and ability to build relations. According to "attachment theory", the most necessary characteristics in the development of attachment style is child's connection with caregiver's attention in times of discomfort . Parenting style has a huge role on an infant's attachment behavior."
To learn more about Attachment Theory,
https://brainly.com/question/28266081
#SPJ4