I believe that Calpurnia finds the food on the back porch.
C. Combine with new atoms
This is how things are made, like oxygen (O2) and hydrogen (h2) combine to make water (H2O)
The work output of a machine divided by the work input is the resistance of the machine

Work done = 100J
Distance = 5 meters
Force = ?

Force = 100/5 = 20N
Therefore, the force needed is 20 Newtons
d is correct answer of a question