Your first choice is right
Answer:
Porosity
Explanation:
Something that is permeable allows liquid or air to pass through it
Non Porous means doesn't allow liquid or air to pass through it, porosity is the opposite of this and allows liquid or air to pass through it.
Answer:
D. desire to surprise his friend and his friend’s failure to recognize him
Explanation:
Answer D
Correct. In these sentences, the author presents a humorous reversal that emerges from the ironic incongruity between the traveler’s plan to “overpower” his old friend with an excess of pleasure and the anticlimactic outcome of the surprise visit. As it turns out, the friend experiences no immediate pleasure from the visit because he fails to recognize the traveler and can only be made to remember him after the traveler gives a “gradual (in this context, methodical) explanation” of who he is.