<span>The respiratory system of the body can be injured by volcanic ash that comes from a volcanic eruption. You can inhale this ash and it can get into your body and system and mess with your inner organs. I don't see how this can happen with boulders and rocks, as they are way too big to be inhaled the way ash can be.</span>
The answer is B:Directional beacons
Sylvia is unable to climb stairs as quickly as she used to
The answer is B, because muscle endurance let's you do things like running for longer periods of time and muscular strength let's you do things like lift heavy weights.