Agroup of organs that work together to perform a closely related function is called a(n)
a. organ system.
b. organism.
c. tissue.
d. cell

♥ A Organ system.
A group of organs that work together to perform a closely related function is called a Organ system.

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )