The man in the diagram is doing work when

a)
the boat floats.

b)
he moves the boat.

c)
he pulls on a rope (attached to the boat).

d)
the wind pushes the boat.

c because that is the only time that it is stated that he is applying a force to the boat himself instead of just moving it .

C. he pulls on a rope (attached to the boat).  

Is the correct answer.

I took the test and this answer was correct.

Have a nice day!

Blue blob

Explanation:

The blue blob to the right of the horse is the protista. The protista is a eukaryotic organism that is not an animal, plant, or a fungi. Because the horse, the leaves, and the mushrooms are already what a protista can't be, this leaves out the blue blob, making it a protista, and therefore making it part of the protist kingdom.