If a geologist finds a rock while in the field chances are high tjat the rock contains. a iron. b carbon. c potassium. and d silicon.

The correct answer is option D, Silicon

Rocks are basically made up of elements which are abundant in the Earth’s crust. Since Earth’s crust has rich reserves of silicon and oxygen, it is made up of silicate minerals. The silicate minerals are basically of two types – light (70 % Silica content) and dark (50 % silica content) silicates.  Light silicates are knows as quartz, muscovite and feldspar and Dark silicates includes ferromagnesian (consisting of iron and magnesium).

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

oxygen +1 most likely