Question

read the paragraph. then, add the best topic sentence.
______ lishman first taught geese to follow his plane for fun. when scientists found out, they asked for lishman’s help with birds that needed to learn how to migrate from one place to another. lishman used a plane to lead a flock of geese from ontario to virginia for the winter. in the spring, the birds flew back north on their own. in the following years, other people used lishman’s ideas to help many kinds of birds learn to migrate.
birds have many reasons to migrate south in the colder months.
bill lishman helped birds learn to migrate by leading the way in his plane.
many kinds of birds and insects migrate each year.

Explanation:

The paragraph focuses on Bill Lishman's role in helping birds learn to migrate, with scientists later using his ideas. The topic sentence should introduce Lishman's contribution. The option "Bill Lishman helped birds learn to migrate by leading the way in his plane" directly relates to the main content of the paragraph, as it centers on his actions with the plane and aiding bird migration. Other options are either too general (about many birds/insects migrating or birds' migration reasons) or don't capture the core about Lishman's help.

Answer:

Bill Lishman helped birds learn to migrate by leading the way in his plane.