Answer:
aye son yall think if i keep answering these questions incorrectly.. they'll find out what im doing and take my li points back?
Explanation:
A bad posture can result in tight muscles. Flexibility is the capacity to move a joint though it's full range.
A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
An example would be a common cold virus which causes the bodies to make antibodies which prevents the person from getting sick.