Final answer:
The subject of this question is English as it involves understanding language and grammar, and analyzing texts.
Step-by-step explanation:
The subject of this question is English as it involves understanding language and grammar. The question is asking about two people being left alone, which refers to a situation in a story or narrative. English classes often focus on analyzing and interpreting texts, so understanding the context and implications of characters being left alone would be a common aspect of studying English.