How is the changing climate of the earth effecting the possible extinctions of animals and plants on Earth ? I NEED HELP

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

Why isn't the balkan region good for farming? it has dry summers. it is far from the sea. its soil is not fertile. its terrain is mountainous. its winters are mild.

Afootpath is to be constructed in a park in the shape of a parallelogram. when a coordinate plane is laid over a map of the park, the vertices of the footpath are (-4,2) (8,2) (11,7) and (-1,7). what is the perimeter of this path