tip
this is just a tip not the true answer but try to add the given number
I believe C is the balanced equation.
Answer:
B. Conductivity.
Explanation:
Conductivity is the quantity of heat passing per second through a slab of unit cross-sectional area when the temperature gradient between the two faces is unity when put in heat.
The ostrich runs 21 N then goes back by 25 S
The displacement is -4 S
21 - 25 = -4