Sergei's question is a scientific question because it is based on observations and could be answered through an investigation. His question has a narrow focus, addresses a gap in his knowledge, and may lead to a hypothesis that can be tested.
Answer:
plants because the green vegetation is our ecosystem source of energy converted into oxygen.
A
Explanation:
1 el pais de las marabillas,se sintio mun asustada al principio y luego se siente anciosa
no se ase mucho no veo la pelicula
