In this region of the forest, spruce and fir trees are predominant.
The correct answer is option 1: predominant.
"Predominant" means having greater importance, influence, or numbers than other things. In the context of the question, it refers to spruce and fir trees being the most common or abundant trees in that particular forest region.
To further clarify, let's break down the other options:
2. Incandescent: This term refers to something emitting light as a result of being heated. It does not relate to the dominance of spruce and fir trees in the forest.
3. Benevolent: This word describes someone or something showing kindness or goodwill. It is not relevant to the dominance of tree species in the forest.
4. Terrestrial: This term is used to describe things related to the Earth or land. While it could be related to forests, it does not convey the idea of dominance of specific tree types.
Therefore, "predominant" is the most fitting term to describe the prevalence of spruce and fir trees in the forest region mentioned in the question.
