Question

adapted from submarines
from the story of great inventions
by elmer ellsworth burns

successful navigation beneath the surface of the
water, though not carried to the extent imagined by jules
verne, was a reality at the beginning of the twentieth
century. instead of twenty thousand leagues under the
sea, less than a hundred leagues had been
accomplished, but no one can foretell what the future
may have in store.

the submarine is primarily utilized in wars. the
weapon used by the submarine is the torpedo. the
torpedo is itself a small submarine able to propel itself,
and it started in the water toward a certain object, to go
under water straight to the mark. it carries a heavy
charge, either of guncotton or dynamite, which explodes
when the torpedo strikes a solid object, such as a battle-
ship.

it would be very difficult for one submarine to fight
another submarine, for the submarine when completely
submerged is blind. it could not see in the water to find
its enemy. the torpedo - boat - destroyer is able to destroy
a submarine by torpedoes, shells full of high explosives,
or quick - firing guns. advantage must be taken of the
moment when the submarine comes to the surface to
get a view of her enemy.

one of the great enemies of the submarine will
probably be the air - ship, for while the submarine when
under water cannot be seen from a ship on the surface,
it can, under favorable conditions, be seen from a certain
height in the air.

the rising and sinking of the submarine depend on
the principle of archimedes. the upward rush of the
12
select all the correct answers.
in which two ways does the sixth paragraph contribute to the development of claims in the passage?

□ it supports the title by giving an example of a great invention.
□ it describes a nonmilitary use for submarines.
□ it illustrates how submarines can be used for recreation.
□ it explains the effects of submarines on science.
□ it lists the different ways air is stored in submarines.

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Explanation:

1. Analyze each option:

• Option 1: The passage is about the submarine (a great invention), and the sixth paragraph (assuming the context of the passage's title related to great inventions) can support the title by giving an example of the submarine as a great invention.
• Option 2: If the sixth paragraph (not fully shown but from the options) describes a non - military use, it contributes to showing the diverse uses of submarines, developing the claims about submarines.
• Option 3: The passage doesn't mention submarines for recreation, so this is incorrect.
• Option 4: The passage doesn't focus on the effects of submarines on science, so this is incorrect.
• Option 5: The passage doesn't list ways air is stored in submarines, so this is incorrect.

1. Based on the analysis, the correct options are the ones that logically contribute to the development of claims about submarines. The first option supports the title (and thus the main claim) with an example, and the second option shows a non - military use, expanding on the uses of submarines.

Answer:

A. It supports the title by giving an example of a great invention.
B. It describes a nonmilitary use for submarines.