Answer:
A.
Explanation:
melting of ice will increase water in oceans due to which water in oceans will increase and salinity will decrease. hence, melting of ice caps near the north pole affects salinity of the ocean
Each half life is 1/2 of original amount, so this would take 3 half-lives because (1/2 * 1/2 * 1/2 = 1/8)
Total time = 24,300 * 3 = 72,900 years
The most metallic element is francium. However, francium is a man-made element, except for one isotope, and all isotopes are so radioactive they almost instantly decay into another element. The natural element with the highest metallic character is cesium, which is found directly above francium on the periodic table.
A possible cause of extinction, as in the case of the Dodo Bird, is being over-hunted <span />
