What aspect of engineering focuses on improving people’s lives?

The aspect of engineering that focuses on improving people's lives is the design of products, structures, or systems. This branch is centered on creating functional and user-friendly solutions that address specific needs and challenges faced by individuals and communities. Through thoughtful design, engineers can enhance usability, safety, accessibility, and performance, ultimately contributing positively to the quality of life for users.

By prioritizing the needs of people during the design phase, engineers play a crucial role in developing innovations that solve problems, promote well-being, and foster sustainable living environments. Whether it involves designing ergonomic tools, creating safe and efficient transportation systems, or developing sustainable buildings, the end goal is to improve everyday experiences for individuals and society as a whole.

The other options, while important in their contexts, are more focused on specific processes or aspects that may not directly correlate with enhancing human life. For example, cost efficiency primarily considers financial aspects rather than the direct impact on people's quality of life. Similarly, manufacturing processes deal with the techniques of production rather than how the end products affect users. Marketing innovations focus more on promoting ideas and products rather than the inherent design elements that improve lives through engineering.