20 free points for a answer! What is your sexuality and why?

According to bowlby which of the following is not required in order for infants to form healthy attachments with their parents

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system

Why do you need two different circuits of blood vessels in your body?