Acacia trees are adapted to savannah ecosystems by... 1
growing long lianas that climb
other trees to search for
sunlight
2
having long tap roots that
spread out to find moisture in
the soil
3
growing large leaves that
absorb sunlight as there is very
little sunlight in the savannah
4
having mobile roots that help
them to walk about

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!