The topic sentence states this main idea.
Answer:
C.
“If there is any practical use for helium other than medicine, laws should change to protect current supplies of the gas.” This sentence summarizes one of the major points of the argument, which is that helium reserves are in low supply.
A lair is a <span>hideout,
a scabbard is a </span><span>sheath for a sword,
a hilt is a handle of a sword,
a complacent person is someone who is not eager to please,
while a covetous person is someone who is eager to obtain or posses,
All of these can be found in dictionaries, and you made a typo by writing liar instead of a lair.
</span>
The last one “Rebecca and Lauren went to the beach”
because it starts with a subject then a active verb