The Sentence Diagram Generator will visually represent the sentence "Motioning them to advance, he closed the door when they had answers." as follows:

1. Main Clause: "he closed the door"

   • Subject: he
   • Verb: closed
   • Direct Object: the door

2. Participial Phrase: "Motioning them to advance"

   • Participle: Motioning
   • Direct Object: them
   • Infinitive Phrase: to advance

3. Subordinate Clause: "when they had answers"

   • Subordinating Conjunction: when
   • Subject: they
   • Verb: had
   • Direct Object: answers

This structure illustrates the relationships between the components of the sentence, highlighting the main action and its context.