What material can be in the aquarium or terrarium in business facilities?

In the context of business facilities, particularly those related to cosmetology, having an aquarium or terrarium can create an inviting and serene environment. The correct answer acknowledges that both fish and nonpoisonous reptiles can inhabit these setups, which is important because it provides a diverse and visually appealing display without endangering the safety of clients or staff.

Fish are often selected for their aesthetic appeal and low maintenance needs, while nonpoisonous reptiles can also enhance the visual interest of the environment. This combination allows for a more dynamic atmosphere, fostering a positive experience for patrons. It's critical for businesses to choose species that are safe to ensure a harmonious and risk-free environment. Thus, selecting both fish and nonpoisonous reptiles adheres to safety guidelines and enhances the ambiance, making this choice the most suitable for business facilities.