Question

a message from the sky
(1) people often look up to the sky to marvel at cloud shapes, sparkling stars,
or a colorful rainbow. (2) the sky is nature’s biggest canvas. (3) in fact, skilled
pilots have used the sky since the 1920s to display words. (4) this process, called
skywriting is an art form that allows people to see unique messages written in the
sky.
(5) writing a message that can be seen across the sky is not easy. (6) pilots
are specially trained to fly upside down and sideways. (7) a nonpolluting oil is added
to the exhaust system of the aircraft to create streams of white smoke. (8) pilots
have to know how to move the airplane just right to form letters while also
controlling the flow of white smoke released from the back of the plane. (9) it

1. which sentence can replace sentence 2 to help develop a more effective

introduction to this paper?
the sky appears blue because sunlight scatters as it
passes through earth’s atmosphere.
the sky has been used by pilots as a place to create
messages that can be seen from the ground.
the sky has inspired artists, poets, and musicians for
hundreds of years.
many people also enjoy watching airplanes as they
travel across the sky.

Explanation:

Answer:

B. The sky has been used by pilots as a place to create messages that can be seen from the ground.