Read the sentence below and select which is a preposition and which is a gerund from the table. ~
I should premise that I use this term, Struggle for Existence, in a large and metaphorical sense including dependence of one being on another, and including (which is more important) not only the life of the individual, but success in leaving progeny.
Darwin, Charles Robert. The Origin of Species. New York: P.F. Collier & Son, 1909–14.