A man uses oars to paddle a boat across a lake, as shown below. The subsequent motion of the boat is best explained by Newton's law of action-reaction. Why? * A) As each oar pushes the water, the water pushes back, making the boat move forward.
B) The mass of the oars is more than the mass of the man, which makes the boat move forward.
C) The gravitational pull on the oars makes the boat move foward.
D) The water is in motion and will remain in motion until the oars make it stop, pushing the boat forward.

B) The mass of the oars is more than the mass of the man, which makes the boat move forward.

Explanation:

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.