medium · Enhanced ACT english
An aerospace engineer is explaining the growing problem of 'Kessler Syndrome' in Low Earth Orbit. [1] As the number of satellites increases, so does the probability of collisions between objects. [2] Each collision creates a cloud of debris that can strike other satellites, triggering a catastrophic chain reaction. [3] Eventually, the debris could become so dense that certain orbits become unusable for future generations.
Which choice provides the most effective concluding sentence?
- In short, space itself is a vacuum where objects can travel at extremely high speeds without resistance.
- Therefore, satellites remain essential for providing reliable high-speed internet access to remote areas of the world.
- Consequently, many private aerospace companies are now competing fiercely to launch their own orbital rockets into space.
- This cascading effect threatens the long-term sustainability of satellite-based communication and navigation.
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