'The most common Christmas tree in the U.S. is the Scotch species of this conifer'
a pine
TREES: The most common Christmas tree in the U.S. is the Scotch species of this conifer
The most common Christmas tree in the U.S. is the Scotch species of this conifer
The most common Christmas tree in the U.S. is the Scotch species of this conifer
TREES
a pine
TREES