Because it is easier to have a chain of command established with the staff if only one person is the leader. Companies and corporations also save money in the practice of only having a single leader or "boss."
I don't know if that answer will exactly help. :)
Belly breathing
deep breathing
Answer:
Your baby's birth weight has most likely doubled by now. Babies continue to gain about 1 to 1¼ pounds (450 to 560 grams) this month and about ½ inch to ¾ inch (1 to 2 centimeters) in length.
Explanation: