Which characteristic describes something labeled as "viable"?

The term "viable" is used to describe something that is capable of life or normal growth and development. In a biological context, it often applies to organisms or cells that have the ability to live, grow, and reproduce under suitable conditions. When something is referred to as viable, it indicates that it has the necessary qualities or conditions to thrive, making it a concept that is not only practical but also essential in fields such as biology, medicine, and even business.

The other options fail to capture the essence of the term "viable." For instance, describing something as unable to sustain life contradicts the fundamental meaning of viability. Similarly, being limited to theoretical concepts or disconnected from reality does not imply any capacity for growth or health, which is central to the definition of viability. Thus, the understanding of what constitutes viability is firmly rooted in the ability to sustain life and develop normally.