Final answer:
A personal area network (PAN) is suitable for mobile users who need to make short-range wireless connections within a small space, such as a single room.
Step-by-step explanation:
The suitable option for mobile users who need to make very short-range device-to-device wireless connections within a small space is a personal area network (PAN). This type of network is most commonly achieved through Bluetooth technology. A personal area network allows devices such as smartphones, headphones, and laptops to connect to each other wirelessly within a close proximity, typically within a single room.