Recall that a period is horizontal, and a group is vertical.
So if cobalt is moving "down" a period, it would be most logical to say that it would be Ni, or nickel. It could also be Copper, Zinc, Gallium, and so on. Make sense?
It was how fast it was disappearing. Once the world's fourth largest lake, the Aral Sea in Central Asia has been losing water for half a century — ever since Soviet engineers began diverting the two rivers that sustain it, the Amu Darya and Syr Darya, in order to grow cotton in the desert.
The correct answer to this question is a. Animals that rely on the sea ice for survival may become extinct as their habitat disappears. This best predicts an outcome of this global climate change in an arctic ecosystem. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
Answer:
Water is contaminated with animal waste
Explanation:
