Final answer:
MOSFETs generally occupy less area on a chip compared to BJTs, allowing for denser integration and benefiting from technology scaling according to Moore's Law.
Step-by-step explanation:
The question asks which of the following occupies less area: a Bipolar Junction Transistor (BJT) or a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). In general, MOSFETs occupy less area on a chip compared to BJTs. This is because MOSFETs can be made very small with today's advanced semiconductor manufacturing techniques, and they operate based on voltage rather than current, allowing for a denser packing on an integrated circuit. Moreover, the design of a MOSFET allows for a simpler scaling down with improvements in technology, which is defined by Moore's Law. This scaling down contributes to the smaller area that a single MOSFET occupies as opposed to a BJT. Therefore, the correct answer is b) MOSFET.