Asked by amori

While preparing for the STEM Challenge Day, Jalen and his friends decided to build a robot that could sort recyclables. They brainstormed several designs and realized that the robot needed to move quickly and stay balanced. After a few tests, they saw that
both
the tall design
and
the short design worked well on uneven floors.
Later, Jalen told the judges that the robot collected bottles faster than expected. He added that it could separate items
(Select)
by color
(Select)
by material, which made it one of the most efficient projects in the competition.

All Answers 1

Answered by GPT-5 mini AI
Fill the first (Select) with "both" and the second (Select) with "and".

Full sentence:
"He added that it could separate items both by color and by material, which made it one of the most efficient projects in the competition."

Note: "both ... and ..." is the correct parallel construction here.