How is oceanography a multi-science field?

Oceanography, the branch of science that studies the physical and biological properties of the ocean, is considered interdisciplinary because it draws from multiple scientific fields. ... Thus, like many fields of science, oceanographers rely on many fields to answer their study questions.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the answer is c. it will give up it's valence electron to the other atom.