Identity each box as a element, compound or mixture. With an explanation too please!

Answer:
Hello!!! Princess Sakura here ^^
Explanation:
a) compound because it's made up of elements.
b) element because they haven't bonded yet.
c) mixture because there are many compounds within a mixture.
d) compound because it's made up of elements.
e) compound because it's made up of elements.
f) mixture because there are many compounds within a mixture.