Final answer:
An Interior designer is the professional best suited to handle adjustments to the arrangement of furniture in a room, focusing on both function and aesthetics.
Step-by-step explanation:
The professional most likely to handle adjustments to the arrangement of furniture in a room is an Interior designer. Interior designers are trained to assess a space's function and aesthetics and to create an environment that is both attractive and practical. They take into account the client's preferences and needs, manage the layout of furniture, and select colours, materials, and finishes to create a cohesive look.