Answer:
Fisheries science. This discipline aims to study and understand fisheries biology, food web, the predator-prey relationship, stock status information, as well as the socioeconomic status of fishermen (commercial and substantial)
Explanation:
The information from this discipline will help environmental scientists understand why there is a decrease in fish in the ocean. The reasons can vary from over fishing to decline in the reproduction of fishes due to climate change.
You must see the mass of Gallium in the periodic table. The mass present there is calculated by a weighted average of the mass of the isotopes, where the weights are the abundances of each isotope. Let X the isotopic abundance of Ga⁷¹. Since there are only Ga⁶⁹ and Ga⁷¹, the isotopic abundance of Ga⁶⁹ is 1-X. Then:

I don't know the options, but probably 40% is the closest to 36.15%.
4 physical descriptions metal, non-metal, metalloid, color, texture, color, texture, state, density, melting, point, boiling poi
Dafna11 [192]
I don't quite understand the question your asking but iron is a metal and is appearance is silvery and greyish colour. Hoped this helped a little! : D