The diagram shows the three steps of the fusion process in the sun.
in what order do the steps occur?
a. x, y, z
b. y, x, z
c. z, y, x
d. z, x, y

D. Z, X, Y

Explanation:

Step 1: Z

Within the Sun two protons fuse together and when this proton-proton pair breaks apart one proton transform into neutron due to weak nuclear force. Along with transformation of neutron, a positron also formed and proton-neutron pair sometimes form deuterium.

Step 2: X

Collision of third proton takes place with deuterium and this collision results in formation of Helium-3 along with gamma rays. These gamma rays are also released as sunlight.

Step 3: Y

Collision of two Helium-3 nuclei takes place which results in creation of Helium-4.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

the answer is barium and copper bromide