Question

Tú oyes ___ tu mamá.

The "personal a" is necessary.

The "personal a" is not necessary.

Answer 1

The "personal a" is necessary.<-------

Answer 2

Tú oyes ___ tu mamá.

The "personal a" is necessary.<-------

The "personal a" is not necessary.
(with a)you hear your mom
(without a)you listen to your mom