The bone that has foramina for the olfactory nerves is the cribriform plate of the ethmoid bone.
The cribriform plate is a thin, horizontal bony structure located at the roof of the nasal cavity. It contains numerous small holes, known as olfactory foramina. These foramina allow the passage of the olfactory nerve (CN I) fibers from the nasal cavity to the olfactory bulbs situated above the cribriform plate.
This anatomical feature plays a crucial role in our sense of smell. When odor molecules bind to receptors in the nasal epithelium, the olfactory nerve fibers transmit sensory information through these foramina to the brain, allowing us to perceive and identify different smells.