Final answer:
The sentence in question is a simple sentence because it consists of one main clause and expresses a single idea.
Step-by-step explanation:
The sentence 'Right now, young people are feeding the homeless' is an example of a simple sentence structure. Despite the presence of introductory words ('Right now'), the sentence comprises one main clause with a clear subject ('young people') and a predicate ('are feeding the homeless').
A simple sentence can be of any length but contains only one independent clause, and this sentence has just that; it expresses a single idea without the presence of subordinate clauses or multiple main clauses.