Final answer:
Georgia O'Keeffe's art included flowers, desert landscapes, and animal bones as subject matter. She is renowned for her large-scale flowers and depictions of the New Mexico desert, which influenced American abstraction profoundly. The correct answer is option a. all of these.
Step-by-step explanation:
Georgia O'Keeffe's subject matter included a variety of themes reflecting the natural world and abstraction. Her works encompassed flowers, desert landscapes, and animal bones. O'Keeffe is particularly well-known for her large-scale, highly detailed close-ups of flowers, which aimed to make viewers take notice of their beauty by presenting them in a way that they could not be overlooked. She was inspired by the natural world around her, including the desert landscapes of New Mexico, where she found the bleached bones of animals, which she believed represented the enduring beauty of the desert and the spirit of America. Her residence near Ghost Ranch provided an array of colors in the hills that influenced her depictions of the landscapes. Through her art, O'Keeffe became a significant figure in American abstraction, offering a unique and expressive perspective on the subjects she painted.