Question

why does the author most likely include the section \what causes the aurora borealis?\ before the section \where and when can the aurora borealis be seen?\

once readers know the causes of the northern lights, they can understand the effects of the lights on cities and towns.

once readers know how the northern lights are formed, they can understand why the lights only appear at certain times of the day and night.

once readers know how colors in the northern lights are formed, they can visualize how the lights look in certain locations.

once readers know how and why the northern lights appear, they can understand why the lights are only visible in certain locations.

Explanation:

To determine the correct answer, we analyze each option:

• First option: The section about causes doesn’t relate to effects on cities/towns, so this is incorrect.
• Second option: The cause (formation) of Northern Lights doesn’t directly explain timing of appearance, so this is incorrect.
• Third option: Color formation doesn’t relate to visualizing lights in locations, so this is incorrect.
• Fourth option: Understanding how and why the Northern Lights appear (from the “What Causes...” section) helps explain why they are only visible in certain locations, which connects to the “Where and When...” section. This makes sense as cause (appearance) relates to location (where they can be seen).

Answer:

D. Once readers know how and why the Northern Lights appear, they can understand why the lights are only visible in certain locations.