Our posterity shall hold us responsible for the devastation caused by cutting of trees.

Answer: Option C

Predecessors : a person who held a job or office before the current holder.
Successors : a person or thing that succeeds another.
Offspring : a person's child or children.
Followers : a person who supports and admires a particular person or set of ideas.
Posterity : all future generations of people.

Synonym of Posterity is Offspring