Answer:
A producing colored sparks in fireworks
C rusting in the presence of water and oxygen
these are the correct answers
Student 2 has seen the most bio-diversity.
This is because all the others see animals of the same species.
As for the other parts of your question, I don't think I can help too much with that.
Answer:
Un terremoto[1] (del latín terraemōtus, a partir de terra, «tierra», y motus, «movimiento»), también llamado sismo, seísmo (del francés séisme, derivado del griego σ [seismós]),[2]
Answer:
Over time, many species gradually adapted to a more oxygen-rich enviroment, allowing them to survive in shallow water and on land.