Answer:
Atmosphere as per my opinion
Explanation:
On Earth, Atmosphere is the top part of Earth because it is up in the sky.
On Earth, Water is the crust on Earth which can't be the top because it is the crust.
Inside Earth, granite is found inside the crust of Earth
Inside Earth, Iron is the core, which is the most inner part of Earth.
After looking all of these, we can conclude that atmosphere is the top layer of Earth.
Please give me brainliest :)