Most of the coniferous trees are found in the Alpine Mountain regions in the part of Western Europe.
The trees, which grow tall and the tip of their leaves are in the shape of a needle are known as coniferous trees. The structure of coniferous trees is in the shape of a cone.
The growth of such trees is most suitable in the mountainous regions or hilly areas, as they also allow a favorable atmosphere for their growth.
Hence, option D holds true regarding coniferous trees. An image of coniferous trees is added for better reference.
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