Answer:
Cluster
Explanation:
A career cluster is a group of related careers.
Environment is something very important today, because it is becoming more and more polluted. People do harm without being aware that they destroy the world. People just want more and more money and more and more destruction, which is definitely the cause, yet people do not know the effect that it can cause. Without explaining the effect that pollution can cause, today's environment cannot be explained. Shortly, by being greedy (the cause), we destroy our habitat (the effect)
Answer: Abstract Algebra, Lie Groups/Algebras, Topology, Complex Analysis and Differential Geometry.
Explanation:
Those are the maths needed
