You are tasked to design a micro system that receives sensor data from multiple sensors and stores it on board.?
A good design exercise as this reflects what you need to do when designing an actual system. Don't let others give you the answer or you will be a failure in real life. BTW, the block diagram isn't a micro system, it's a full blown computer which is difficult to interface to. A little Atmel micro is easier to interface sensors to, then have it talk to your computer.
And unless you give a better description of "Sensor" including their specifications, that question is so open that basically any answer could be considered valid. Personally, I'd use an Arduino Nano for that. Mega if you want a touchscreen integrated into the design. Physically having to connect the readout PC to the design is so 20th century, though. Never heard of WLAN or Bluetooth?
It is clear that you are determined not to do your own homework, as I have already seen this question posted on Quora.
This sounds like a good one. Good luck !