Final answer:
The sentence written in the active voice is 'The boy jumped on the trampoline,' where 'the boy' is the subject actively performing the action.
Step-by-step explanation:
To determine whether a sentence is written in active or passive voice, we can apply a few steps. In the active voice, the subject of the sentence performs the action of the verb, while in the passive voice, the subject is being acted upon, often with the use of a form of the verb 'to be' and the preposition 'by.' Considering the sentences provided:
- The wedding dress was sewn by Katie. (Passive)
- The red barn was painted by the farmer. (Passive)
- The boy jumped on the trampoline. (Active)
- The chocolate cake will be served to the queen. (Passive)
Therefore, the sentence written in the active voice is 'The boy jumped on the trampoline.' Here, 'the boy' is the subject performing the action of jumping.