Read a text about thundersnow. Thunderstorms of snow are so unusual that many people don't realize they exist or how dangerous they are. When it comes to lightning risk, a thunderstorm of snow, or thundersnow, is no different from a thunderstorm of rain. Thunder signifies the presence of lightning, so even if you don't see any lightning flashes, it's crucial to seek safe shelter in order to avoid being struck. In addition, thundersnow often involves heavy snowfall and enormous ice pellets, creating even more safety risks. While you may be tempted to grab your camera and explore this otherworldly winter wonderland, the safest thing to do during thundersnow is to remain indoors. Select the three details that are included in the text.

First, you have to find the main idea (Which is "Thundersnow is dangerous")

Then, you have to find the supporting details, which is what the question is asking for

I believe these are the details:

-When it comes to lightning risk, a thunderstorm of snow, or thundersnow, is no different from a thunderstorm of rain.

-Thunder signifies the presence of lightning, so even if you don't see any lightning flashes, it's crucial to seek safe shelter in order to avoid being struck.

-In addition, thundersnow often involves heavy snowfall and enormous ice pellets, creating even more safety risks

I hope this helps and is correct! Good luck!

16.) true

17.) true

18.) no information in the text

19.) false

20.) no information in the text

the underline word is basically like a prepositional phrase.