What is the relationship between automation and electronics?

In general the automation is the science of control in machines for control in a particular machine, we need to use electronics

For example, if you want a control motor rotation depends on the DC power (DC motor), we need to circle H-Bridge

(...It is a circle designed transistors or other components such as thyristor

Electronics is the technique which deals with electrical and electronics  components major and minor can be joined together to form a circuit for user defined task.

Automation is the advanced form of electronics based many circuits(analog and digital) connected together  which form a device for particular function. or task which is usually automatic to semi automatic.