Question

i-ready
text structures, part 2 — quiz
and swings didnt exist until the 1920s. during this
decade, playgrounds popped up all over the country, not
just in cities.
kids swinging from a giant stride
for a long time, playgrounds remained the same. then, in
the 1960s, adventure playgrounds were introduced.
community volunteers built these playgrounds with left-over construction materials, such as wood, rope, and
concrete. the playgrounds featured unique climbing
structures, tunnels, bridges, and tire swings
how were adventure playgrounds
of the 1960s different from
playgrounds of the 1920s?
they were made from unused building
materials.
they had swings and climbing
structures.
they had merry-go-rounds and long
slides.
they were built in small towns as well
as cities.

Explanation:

The 1920s playgrounds had swings, climbing structures, and were built in cities and small towns. The 1960s adventure playgrounds were distinct because they were constructed by volunteers using leftover/unused building materials like wood, rope, and concrete, which is not noted for 1920s playgrounds. The other options describe features of 1920s playgrounds, not differences that set 1960s ones apart.

Answer:

A. They were made from unused building materials.