The descriptive structure that both authors uses helps the reader to understand that space travel is a challenging mission and people have worked on its development for several decades to make it a possibility.
<h3>Who is an author?</h3>
An author is a person who creates or write something. Authors is the writer of a book. The name of the authors is published in the front and last of the book.
The options are attached:
A. space travel is a challenging mission and people have worked on its development for several decades to make it a possibility
B. space travel had a lot of problems in its early stages and scientists have only recently been able to resolve them
C. robots are slowly replacing human astronauts and beginning to travel to distant parts of the universe and study it
D. the history of space travel was far grander and richer than it is today because there were many more manned explorations.
Thus, the correct option is A.
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Answer:
im not sure what kind of answer u r looking for
Answer:
The sidebar tells us what Earth scientists are actually doing about the risk of an asteroid impact.
Explanation:
The main part of the page discusses how frequently the moon is hit by rocks; how most rocks are too small to make it past Earth's atmosphere; how the rocks that do make it all the way to Earth's surface are usually pretty small and don't hit anything important; how screwed we would be if a massive rock – like an asteroid – made it to Earth's surface.
The sidebar says that scientists are understandably worried enough about these asteroids – they "feel the danger is to great to ignore" – so they're keeping a lookout for asteroids that might be on a collision course with Earth.
