It is a valuable networking resource used by rescuers, shelters and humane organizations to save animals' lives.
(It; is; a valuable networking resource used by rescuers, shelters and humane organizations) (a valuable networking resource; used; by rescuers, shelters and humane organizations)
It a valuable networking resource
is used
a valuable networking resource used by rescuers, shelters and humane organizations
by rescuers, shelters and humane organizations