Does one use 'a' or 'an' before the word x-ray?

It's timed! overpopulation can affect the natural environment • limiting land available for crops.• lowering the standard of living.• causing the destruction of forests.• worsening sanitation in cities.

Which lines spoken by romeo in act iii, scene i of romeo and juliet best support the inference that romeo desires future peace between the montagues and capulets? check all that apply. abc romeo: tybalt, the reason that i have to love thee doth much excuse the appertaining rage to such a greeting; villain am i none, romeo: i do protest i never injur'd thee, but love thee better than thou canst devise, romeo: draw, benvolio; beat down their weapons, gentlemen, for shame, forbear this outrage! romeo: alive! in triumph! and mercutio slain! away to heaven, respective lenity, and fire-ey'd fury be my conduct now! romeo: this day's black fate on more days doth depend; this but begins the woe others must end.

How is president obama using an appeal to reason, or logos, in this excerpt? by explaining why each person must work hard in order to succeed by explaining why working together is necessary for success by explaining why attempts at working together in the past failed by explaining why each person must look out for him or her self