I think the answer is c. gerund
Since this is a poem and you have a comma after river bank, the answer would be Halting because it is starting a new line. River should not be capitalized in this sentence because it is not a proper noun. It is just a common noun.
Answer: intransitive obsolete
Explanation:
Extroversion, agreeableness, conscientiousness, emotional stability, and openness to experiences are the _____. <span> <span><span> <span> </span> <span>influences on personality </span></span><span> <span> </span> <span>traits used to define personality </span></span><span> <span> </span> <span>phases in the search for a sense of self </span></span><span> <span> </span> phases of personality development</span></span></span>