Select the sentence that uses active voice.

The needy cat is fed by Celia.
The back of the couch was scratched up by the cat.
Just before dawn, the cat wakes up and cries out to be fed.
The can of fishy-smelling food is eaten greedily by the cat.

The needy cat is fed by Celia.

To determine which sentence uses the active voice, we need to identify the subject performing the action. In active voice sentences, the subject directly performs the action. Let's analyze each sentence:

1. "The needy cat is fed by Celia." This sentence uses the passive voice because the subject "the cat" is receiving the action "is fed" rather than actively performing the action.

2. "The back of the couch was scratched up by the cat." This sentence also uses the passive voice because the subject "the back of the couch" is being acted upon by the cat.

3. "Just before dawn, the cat wakes up and cries out to be fed." This sentence uses the passive voice because the subject "the cat" is not actively performing the action "to be fed." It is the cat's own action of waking up and crying out.

4. "The can of fishy-smelling food is eaten greedily by the cat." This sentence uses the passive voice because the subject "the can of fishy-smelling food" is being eaten by the cat.

None of the given sentences use the active voice as they all employ the passive voice construction.

Identify the subject; then ask yourself if the subject is DOING the action of the verb.

EX: Is the cat feeding someone? Of course not, so this sentence uses passive voice, not active.