Question

the dark.
the manhattan project included huge research centers in
tennessee, new mexico, and washington. thousands of people
worked in these locations. they and their families needed
somewhere to live. so, the government built giant “secret cities.”
few people knew where these cities were. the cities could not
be seen on maps. they were surrounded by wire. military police
guarded them 24/7. streets had confusing names. that way,
strangers coming in wouldn’t know where they were.

living in the cities wasn’t easy. the government read every piece
of mail. just getting mail was difficult. no one had an address.
no one had a phone, either. even people’s language was watched.
giant billboards were everywhere. they warned residents to be
careful about what they said.

the u.s. didn’t want other nations to learn about the project. the
u.s. was nervous about the soviet union (ussr). the u.s. and the
ussr were on the same side in the war. but the two nations
didn’t have a good relationship. as work went on, spies sent
details about the project to the ussr.

in august 1945, the u.s. exploded nuclear devices over the
japanese cities of hiroshima and nagasaki. the attack soon led
to the end of the war. meanwhile, the soviets had learned the

question 3
which means almost the same as security?
a. cleaning
b. building
c. safety
d. study
submit
extras

Explanation:

To solve this, we analyze the meaning of "security" and the options. "Security" relates to protection or safety. Option A (cleaning) is about hygiene, B (building) is about construction, D (study) is about learning. Option C (safety) has a similar meaning to security.

Answer:

C. safety