What kind of research are the following studies examples of?

a) The reproductive success of flying squirrels in Kainuu.
observational research experimental research basic research applied research

b) The distribution of flying squirrels in an area where a new shopping mall is planned to be built.
observational research experimental research basic research applied research

c) Estimating the size of the moose population in order to give out the right number of hunting licenses.
observational research experimental research basic research applied research

d) Studying the fungi living in symbiosis with spruce trees.
observational research experimental research basic research applied research

e) Comparing the fungi living in symbiosis with spruce trees in different soil types.
observational research experimental research basic research applied research