Question 4 of 20 Which statement best describes the effect of the magnet on the block of
material next to it?
S
N
O A. The magnet has magnetized the center of the block.
B. The magnet has magnetized the whole block.
C. The magnet has magnetized the left side of the block.
D. The magnet has magnetized the right side of the block.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

what is the actual question though?

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.