Question

summarizing informational texts — instruction — level e
morgans safety hood was
the model for the gas
mask used by the u.s.
army during world war i.
the gas mask saved
countless lives.
ed two lives and recovered four
ed the site.
tented many ideas that saved
e of these \bright\ ideas was
ose days, city streets were
ges, bicycles, and pedestrians.
erican in cleveland to buy an
new car one day when he
. it was between another car
. morgan decided that traffic-
what is another way that
morgans traffic signal made city
traffic safer?
main idea
morgans electric traffic signal made
city traffic safer.
key detail
key detail
it helped
control
carriages,
bicycles, and
pedestrians.
it helped him
buy his car.
it caused
traffic jams.
it worked 24
hours a day.

Explanation:

We need to identify a key detail that shows how Morgan's traffic signal improved traffic safety. The first key detail notes it controlled carriages, bicycles, and pedestrians. We eliminate incorrect options: "It helped him buy his car" is unrelated to traffic safety, "It caused traffic jams" would make traffic less safe, so the remaining valid safety-focused detail is that it operated 24 hours a day, providing consistent traffic control at all times.

Answer:

It worked 24 hours a day.