Answer:
The correct answer is "bright flowers".
Step-by-step explanation:
Most flowering plants reproduce by pollination, the act at which insects transfer pollen grains from male anthers to female stigmas. One adaptation of plants to enhance their reproduction success by pollination is the development of flowers with bright colors. Most insects that pollinate plants are attracted to bright flowers. For instance, bees are attracted to bright blue and violet colors, while butterflies are attracted to bright yellow, orange, pink and red colors. Therefore, having bright flowers is the adaptation that most directly assist a plant in reproducing.