The four most important points in the correct orders are:
- Some submarines are used for oceanic exploration.
- Submarines either rise or submerge by displacing water.
- Sometimes, submarines can be seen from an aeroplane.
- Certain submarines have a special chamber for divers.
- Most submarines are created solely for military purposes.
- All submarines must be sure not to descend too far underwater.
What is a summary?
This is known as a brief account of the main points of something.
Hence, we can see that from the main points of the subject of the submarines, the brief accounts are stated above.
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