B. u.s. acquired land through war, treaty, and settlement

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Kyla injures her leg during a rock climbing accident. which type of rehabilitative care would she need after her injury has healed?

What link in the chain of transmission is described in the paragraph? sarah has been eating and sleeping poorly. she was just diagnosed with pneumonia. tests showed the illness was caused by streptococcus pneumoniae. in the chain of transmission, sarah is the (blank) , and streptococcus pneumonia is the (blank).