What makes an opening powerful?

Does anyone know the answer to the question?

Select the correct text in the passage. which two lines in this excerpt from shakespeare's romeo and juliet foreshadow the tragic fate of romeo and juliet? friar laurence: so smile the heavens upon this holy act, that after hours with sorrow chide us not! romeo: amen, amen! but come what sorrow can, it cannot countervail the exchange of joy that one short minute gives me in her sight: do thou but close our hands with holy words, then love-devouring death do what he dare; it is enough i may but call her mine. friar laurence: these violent delights have violent ends and in their triumph die, like fire and powder, which as they kiss consume: the sweetest honey is loathsome in his own deliciousness and in the taste confounds the appetite: therefore love moderately; long love doth so; too swift arrives as tardy as too slow.

Dogs make wonderful pets because they keep us happy and healthy, the topic sentence is "dogs make wonderful pets". can someone me write a unrelated sentences to the topic and can be eliminated. need asap