7. Mаgmа Evоlutiоn [15 pts. Tоtаl] (Part 1 of 3) Figure 1: The shaded gray area on the ternary diagram below shows the range of initial composition of basaltic (mafic) magma formed by partial melting of the mantle. The numbered pathways show two discrete ways in which the composition of the magma can evolve during cooling and crystallization before solidifying into plutonic igneous rock (black stars) (Select all that apply).. 7a. [5pts]: TREND 1: Use the Ternary plot below (Fig. 1) to explain compositional evolution of melt (Trend 1) due to fractional crystallization during magma cooling and ascent through the lithosphere. Select all correct answers.