The last one because empathy is when you feel bad for another person.
You should stop and stretch or walk around, just cool off and loosen your muscles. If you are lifting weights and you feel pain, then maybe the weight is to heavy.
Answer:
Fear (from a quick Google search): "An unpleasant feeling triggered by the perception of danger, real or imagined."
Simply put, fear keeps us safe (or at least tries to). It helps keep us on the lookout for things that could be of harm to us.
