This is a highly technical subject. It is not possible, or desirable, to fully explain it here.
Basically electromagnetic waves of the appropriate frequency are generated, these are then manipulated (called modulation) in various ways to carry information.
In 1895 Marconi was the first to broadcast an electrical signal without using wires - inventing the radio.
In a free market economy, you the owner gets to chose who it is produced by, how it is produced and what is prdouced. In a command economy, the government chooses how it is produced, who it is produced by and what is produced. A mixed economy is mixed with command and free market.
Its not. Semen is produced in the testis & the prostate.
Where should products be produced
What is to be produced?
Mass produced foods are foods that are produced by the thousands.
It is produced in the placenta.
it is produced by god
What did meatpacking produced?
Microwaves are produced when?
Lipase is produced in the Small Intestine and Pancreas.Lipase is produced in the pancreas.
they are produced in gills