The correct answer is B. Giant sequoias invite a favorite tourist activity, taking photographs
Step-by-step explanation:
An appositive is a noun phrase that is added to rename a previous noun, additionally, appositives are usually separated by commas, dashes or similar punctuation marks. On the other hand, a gerund is a word ending in -ing while a gerund phrase is composed by the -ing word and other words that can be objects or modifiers (adverbs or adjective). In this way, in the sentence Giant sequoias invite a favorite tourist activity, taking photographs, the appositive is taking photographs as it renames the previous noun which is tourist activities, also, this appositive is compound by a gerund (taking) and an object (photographs) that is separated from the main sentence by a comma. Thus, the sentence that includes an appositive is B. Giant sequoias invite a favorite tourist activity, taking photographs.