Answer:
i think its the second option
Explanation:
Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.
Explanation:
The first one is B and the second I’m pretty sure is A and if not A then B
Answer:
Los papás de Matilde <em><u>S</u></em><em><u>O</u></em><em><u>N</u></em><em><u> </u></em>de Guatemala.
Explanation:
porque está hablando en plural.
¡ No puedo entender las matemáticas !
