Why do traits for silk flexibility vary within this family of Darwin's bark spiders?

What is the relation between concentration of reactants and the rate of chemical reaction?

How many moles of al3+ ions are in 1.25 moles of al2o3

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic