Answer:
that's not a true friend, a true friend would never stop talking to you or ignore you when you try talking to them.
A becuaase you breathe in oxygen and you release carbon dioxide.
B. low self-esteem can lead to depression
we can't really have an exact number of her heart rate because i haven't experienced it first hand and i need to know what barbara's full name is. it could be somewhere on the internet.