As a basis for understanding this concept: a. Students know ecosystems can be characterized by their living and nonliving components.
(a. Students; know; ecosystems can be characterized by their living and nonliving components) Context(a. Students know,List([43, 59))):(ecosystems; can be characterized; by their living and nonliving components)
a. Students know,List([43, 59))
a. Students ecosystems
know can be characterized
ecosystems can be characterized by their living and nonliving components
by their living and nonliving components