Final answer:
A pine cone contains multiple gymnosperm ovules, where fertilization and seed development occur, distinguishing it from angiosperm seeds found in apples, acorns, and sunflowers.
Step-by-step explanation:
The object that contains multiple gymnosperm ovules is a pine cone. Gymnosperms, such as pine trees, have a life cycle characterized by alternation of generations, with a dominant sporophyte stage. The female cones, or ovulate cones, contain the ovules where megasporocytes undergo meiosis. Each ovule can develop into a female multicellular gametophyte that encloses an egg. Upon fertilization, the zygote will give rise to the embryo, resulting in a seed that is covered with a seed coat and contains tissues from three separate generations. In comparison, the other options listed, such as apple, acorn, and sunflower, are associated with angiosperms, which have seeds that develop inside an ovary, not on cone scales.