The deliberate radiation of electromagnetic (em) energy to degrade or neutralize the radio frequency long-haul supervisory control and data acquisition (scada) communications links, best explains what?

Best explains Jamming

Explanation:

The deliberate radiation of electromagnetic (EM) energy to degrade or neutralize the radio frequency long-haul supervisory control and data acquisition (SCADA) communications links, best explains what?

Jamming is defined as the blocking or interference with authorized wireless communications. it's a problem  in personal area network wireless technologies. Jamming can occur inadvertently due to high levels of noise .

Jammers can send radio signals to interfere or disrupt communication flows by by decreasing the signal-to-noise ratio.They use radio frequency to interfere with communications by keeping it busy.

it is easily magnetized.