Fact 1: The color of leaves on deciduous trees usually changes in the autumn season. Fact 2: Douglas Fir trees have fir cones. Given the two facts above, answer the question "What non-deciduos types do not change colors?" with the following options: - Conifers - Frogs - eukyarotes - Echinoids - monotremes - opossums - ferns - heterotrophs
A:
Conifers