Negative Feedback Loops

For negative feedback loops, I decided to elaborate using terminology and illustrations from a
feedback and systems class I took last semester. Consider the diagram shown below.

G represents a function or system operator of a medium "R". "H" represents a negative feedback
operator that sends information back to the source through route "B", then subtracts from "R"
to create "E". "H" must be negative or else the system will rapidly become unstable and will
explode and or collapse. An example of this could be population of a certain species "R". As
population "G" increases, it will forever increase without a negative feedback function from "H"
such as widespread disease or insufficient food sources. this negative feedback function
causes the population to drop back to a lower level because it subtracts population from "R" to
create "E" where the system becomes more stable. The population will continue to settle until it
reaches a stable level.