Biophilic design is a concept that incorporates elements of nature into the built environment in order to enhance the well-being and productivity of the people who use that space. Some common elements of biophilic design for interior spaces in buildings include:

• 1. Natural light: Incorporating windows and skylights that bring natural light into the space can improve mood and productivity, as well as help regulate circadian rhythms.
• 2. Plants: Adding plants to interior spaces can improve air quality, reduce stress, and enhance the overall aesthetic of the space.
• 3. Natural materials: Using natural materials such as wood, stone, and clay in the design and construction of the space can create a sense of connection to the natural world.
• 4. Water features: The presence of water, whether it be a small fountain or an aquarium, can have a calming and soothing effect on occupants.
• 5. Biomorphic shapes and patterns: Incorporating shapes and patterns found in nature into the design of the space can create a sense of connection to the natural world.

Interior design is needed for several reasons:
Functionality: A well-designed interior space should be functional, efficient, and practical. It should also allow for ease of movement and flow.
Safety: Interior design should also consider safety issues, such as ensuring that electrical outlets are properly placed and that there are no tripping hazards.
Aesthetics: Interior design can also be used to improve the appearance of a space, making it more visually appealing and attractive.
Comfort: A well-designed interior space should be comfortable for the people using it, with appropriate lighting, temperature, and acoustics.
Branding: For businesses, interior design can be used to reflect and reinforce the company's brand image and values.
Overall, interior design is important because it can impact the functionality, safety, aesthetics, comfort, and branding of a space.

There are several reasons why an interior designer might be needed:
Expertise: Interior designers are trained professionals who have the knowledge, skills, and experience to design functional, safe, and aesthetically pleasing spaces. They have a deep understanding of materials, finishes, lighting, and other design elements, and can help you make informed decisions about these aspects of your project.
Time-saving: Hiring an interior designer can save you time and effort, as they can handle all the details of the design process for you. This can be especially helpful if you have a busy schedule or are not confident in your ability to design the space yourself.
Problem-solving: Interior designers can help you solve design problems and overcome challenges, such as dealing with a small or oddly shaped space, or integrating different design styles.
Cost-effectiveness: An interior designer can help you stay within your budget and avoid costly mistakes, such as choosing materials that are too expensive or not suitable for the space.
Overall, hiring an interior designer can provide expertise, save time, solve problems, and be cost-effective, making it a worthwhile investment for many people and businesses.