Answer:
Isolation—this passage illustrates how sad Walton feels about having no one to share his success or failure with.
I'm pretty sure that it is C
He sells the dog to General Miles.
The common idea presented in both ‘our solar system: In-Depth’ & ‘Our Solar System’ is our solar system in detail.
<u>Explanation
:</u>
Both of them talk about the solar system, the sun, and its planets, their constituents, sequence of the location of the planets in reference to the sun, their formation and significance.
Besides the solar system, the former also talks about the Milky Way, its formation, the explosion of two supernovas that led to the formation of solar systems, and other constituents of the Milky Way - a spiral mass and our galaxy, one among many others in the big universe.
It also gives a reason behind the location of the first four planets near the sun and the gaseous and icy masses away from the sun.
It also talks about the other masses that are there in the Milky Way like the asteroids and comets.
