Final answer:
Real estate brokers bring buyers and sellers together physically, by organizing in-person meetings, and emotionally, by navigating the emotional aspects of transactions.
Step-by-step explanation:
Real estate brokers act as market facilitators by bringing buyers and sellers together. The correct completion of the sentence is 'physically and emotionally.'
This means that brokers not only organize meetings and showings where buyers and sellers can meet in person (physically), but they also often help to navigate the emotional aspects of real estate transactions, aiding parties to reach an understanding and proceed with negotiations (emotionally).