Ageologic feature of divergent plate boundaries in oceanic crust is the formation of
a. trenches.
c. u-shaped valleys.
b. fossils.
d. rift valleys.

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

Can someone me with this plz? ! i'm putting 20 points on it!

Suggest 3 different reasons why there is an ageing population in the uk .