Electromagnetic fields that transmit waves of electromagnetic energy, or radiation into space is determined by its __ frequency size charge electricity

## Step 1
The problem is asking us to identify the factor that determines the transmission of electromagnetic waves into space. Electromagnetic waves are a type of energy that travels through space in the form of waves. These waves are characterized by their frequency, wavelength, and amplitude.

## Step 2
The frequency of an electromagnetic wave is the number of waves that pass a point in a given amount of time. It is measured in hertz (Hz). The frequency of an electromagnetic wave determines the type of radiation it is, such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

## Step 3
The size of an object, its charge, or the presence of electricity do not determine the transmission of electromagnetic waves. The size of an object does not affect the frequency of the waves it emits. The charge of an object can affect the direction of the waves, but not their frequency. Electricity can generate electromagnetic waves, but the frequency of these waves is determined by the frequency of the electricity, not the presence of electricity itself.