Which type of health insurance provider generally does not allow patients to obtain services outside its preferred network of doctors and specialists?

Can someone give me one specific health problem, and explain it. !

When trimming plants and vines: a.burn all the poisonous plants b.touch poison oak and poison sumac with your bare hands c.wear gloves d.cut as quickly as possible

Which of the following is an important part of good posture? a. slumped shoulders b. arched back c. feet shoulder-width apart d. belly out