because sentece b is the explanation of sentence c which is why the guirrella losses their ability to disengage etc.
hope this helps
environment: the surroundings in which a person lives
planet: a celestial body in space that may or may not serve as a host for living things
healthy: able, fresh, athletic, etc.
energy: vitality, power, efficiency. etc.
earth-friendly: ecological, healthy, green, etc.
Student-Centered Learning, also known as learner-centered education, broadly encompasses methods of teaching that shift the focus of instruction from the teacher to the student.
their families ? ...