Question

from spectacular
a flash of lightning, and then—something else. high above the
storm, a crimson figure blinks in and out of existence. if you saw it,
you are a lucky witness of a sprite, one of the least understood
electrical phenomena in earth’s upper atmosphere. but if you
caught it on camera, your photo could contribute to a
ground - breaking scientific discovery.
nasa’s newest citizen science project, spriteacular (pronounced
sprite - tacular), leverages the power of crowdsourcing to advance
the study of sprites and other transient luminous events, or tles.
tles include a range of electrical phenomena that occur above
thunderstorms and produce brief flashes of light. the new citizen
science project aims to connect professional scientists with
members of the public who would like their camerawork to
contribute to scientific studies....
sprites occur at some 50 miles (80 kilometers) altitude, high
above thunderstorms. they appear moments after a lightning
strike—a sudden reddish flash that can take a range of shapes,
often combining diffuse plumes and bright, spiky tendrils. some
sprites tend to dance over the storms, turning on and off one after
another. many questions about how and why they form remain
unanswered.
what does the description of tles in paragraph 3 most clearly
suggest about them?

1. tles can be mistaken for lightning.
2. tles are a relatively common occurrence.
3. tles can emerge quickly and seem to move.
4. tles are a consistent presence in thunderstorms.

Explanation:

To solve this, we analyze each option using paragraph 3:

• Option 1: Paragraph 3 doesn't mention TLEs being mistaken for lightning. It describes their own appearance after a lightning strike, so eliminate 1.
• Option 2: The passage (including paragraph 3) emphasizes TLEs are rare/poorly understood, not common. Phrases like "lucky witness" and "many unanswered questions" suggest they aren't common, so eliminate 2.
• Option 3: Paragraph 3 says TLEs (sprites) "appear moments after a lightning strike" and "some sprites tend to dance over the storms, turning on and off one after another". "Appear moments after" shows quick emergence, and "dance" implies movement. This matches.
• Option 4: "Consistent presence" implies they're always there, but the passage says they're transient (brief flashes, appear moments after strikes) and poorly understood, so they aren't consistently present. Eliminate 4.

Answer:

1. TLEs can emerge quickly and seem to move.