Решение:
- 1. The original sentence is in the active voice: "Birds eat seeds."
- 2. The object ("seeds") becomes the subject in the passive voice.
- 3. The verb "eat" is in the simple present tense. In the passive voice, we use the present tense of "to be" (is/am/are) + the past participle of the main verb.
- 4. The past participle of "eat" is "eaten".
- 5. Since "seeds" is plural, we use "are".
- 6. Therefore, the passive form is: "Seeds are eaten by birds."
Ответ: Seeds are eaten by birds.