Question

Which sentence contains parallel structure?
Derrick’s sister was proud that her big brother coached her soccer team.
Derrick coached his sister’s soccer team and managed his brother’s baseball team.
Derrick had managed his brother’s baseball team for the past three seasons.
Derrick was a great older brother, helping to coach his siblings’ sports teams each season.

Answer 1

"Derrick coached his sister’s soccer team and managed his brother’s baseball team."

Explanation: it uses two parallel verb phrases ("coached ... team" and "managed ... team") joined by "and," keeping the same grammatical form.