The forest

A teacher is taking her students on an exploratory trip to the forest.

Student: I have never seen so many evergreen trees. It’s amazing!
: I want you to pay attention to the fauna and the flora. The forest is a great eco-system.
Student: These trees have beautiful foliage, are these oak or elm trees?
: These are elm trees. Who can tell me which category these evergreen trees here belong to?
Student: I know, these are like pine trees, they are called coniferous trees.
: Very good! Enjoy the fresh air before we go back to the city!