Explain the following statement: “Your blood is like a train that comes to town to drop off supplies and take away the garbage.” PLS I NEED THIS RN

Ineed to find the answer of this question because i dont understand it

‘which reaction would most likely require the use of an inert electrode?

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.