The answer here is B. The phrase is "on the left." It is telling you where. An adverb phrase can tell you either why, where, how, or when.
Answer:
He wanted to indicate his strong support for the program, and this [speech] was the chance to do it." At Rice, Kennedy stressed that humanity's charge into space is inexorable, and that the world would be better off with the United States leading the way
Explanation:
The common idea presented in both ‘our solar system: In-Depth’ & ‘Our Solar System’ is our solar system in detail.
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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.
This is off topic, and not related to homework, but I want fuzzy socks, a cat, and some books.