Answer:
The tension force transmitted through the chains
Step-by-step explanation:
The gravitational force can only pull the block downward, so the first two options are incorrect. Normal force is present only when an object is on a surface, so the last option is also incorrect.
Tension is a force exerted by a string or chain, so the third option is correct.
Are you sure your question starts with Why?
I believe it should start with what, if so then Z is the 100's
For your info: N is the thousand's, Z the hundred's, Q tenth & R the unit
So there's 8 pieces of pizza in each box for 7 boxes 7*8=56 so 56 people get a slice of pizza.