Final answer:
An intra-sector system refers to a collection of components that operate within the same sector. In biology, an example would be the skeletal system and muscular system, as they both belong to the same structural and support sector. The correct option is d.
Step-by-step explanation:
A system comprising several components all within the same sector is referred to as a(n) Intra-sector system.
In the context of biology, an intra-sector system can refer to groups of biological systems that interact closely within the same biological sector or category, such as the muscular system and the skeletal system, which are both part of the structural and support sector of an organism.
These biological systems are indeed interdependent, as the function of one affects the function of the other; however, the term intra-sector specifically denotes that they exist within the same category of biological systems.
Furthermore, to further illustrate the concept of interdependence within biological systems as explained in standard 2.D.1, we know that all biological systems, from cells and organisms to populations, communities, and ecosystems, are affected by complex biotic and abiotic interactions involving the exchange of matter and free energy.
In terms of economic sectors, a software developer would typically work in the quaternary sector, which is concerned with information services and intellectual activities. The correct option is d.