Concept:The correct opposite word must be the one that means the direct reverse of the underlined word and also fits naturally in the gap.
Explanation:The underlined word here means
Hostile, which means unfriendly or showing opposition.
Look at the options: gentle, unacceptable, suspicious, amicable.
The word
amicable means friendly and pleasant, which is exactly the opposite of hostile.
It also fits the sentence gap correctly because it describes a peaceful and friendly relationship.
Therefore, the best choice is option D.
Answer:D. amicable