A comparative adjective is used when we compare and contrast two different objects. The adjective is either connected with the suffix -er, or add the word more. From the given sentence above, the comparative adjective used is "more forceful". The comparison is between the mighty water spirit and any creature of land or sea.
Definition 2 would be the correct answer.
Embracing literary, musical, theatrical, and visual arts, participants sought to reconceptualize “the Negro” apart from the white stereotypes<span> that had influenced black peoples’ relationship to their heritage and to each other. They also sought to break free of Victorian </span>moral<span> values and bourgeois shame about aspects of their lives that might, as seen by whites, reinforce racist beliefs. </span>
