Give detail answer about k-2

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c

Which two following best identify the central themes of this speech in the passage the man in the arena