How different specimens are preserved in the museums?

In museums specimens can be preserved in the following ways:
(a) Most of the specimens are preserved in the containers or jars in preservative solutions.
(b) Some specimens are preserved in the dried form.
© Insects are preserved in insect boxes.
(d) Larger animals like birds and mammals are usually stuffed and then preserved.
(e) Museums also have skeletons of animals as specimen.