An individual who swims for longer distances in shorter amounts of time each day is improving their

it's a common sense question think with coll head now there is the options for you - a) it's a wrong question b)in his dream c) he is dead d)sleeping during the night time

explanation:

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.