Final answer:
The unit that represents the number of bits sent during a timing interval in traffic shaping is Bits per second (bps). Therefore, the correct answer is d.
Step-by-step explanation:
The traffic-shaping tool unit of measure that represents the number of bits sent during a timing interval is Bits per second (bps). This is the most fundamental unit of data rate used to quantify how much data is transmitted in one second.
While options a) Packets per second (pps), b) Kilobits per second (Kbps), and c) Megabits per second (Mbps) also represent data transfer rates, they are multiples or different aspects of the basic unit, which is bits per second (bps). The definition of traffic shaping often involves controlling the amount of traffic being sent into a network in a specified period of time, thus managing the data rate, and bps is the base unit for this measurement.