I think it’s number 1. Check the answer first.
Mobile phones transmit and receive signals using electromagnetic waves, that is, wireless signal are electromagnetic waves which can travel through a vacuum, they do not need a medium or matter.
<h3>What are electromagnetic waves?</h3>
They are generated by electrical and magnetic particles moving at the same time (oscillating).
<h3>Characteristics of electromagnetic waves</h3>
- Network waves are electromagnetic waves.
- A mobile phone has coverage when it receives electromagnetic waves from at least one base station.
- They do not necessarily require a material medium for their propagation.
Therefore, we can conclude that electromagnetic waves are those that do not need a material medium to propagate and include, among others, radio, television and telephone waves.
Learn more about electromagnetic waves here: brainly.com/question/13803241
<span>HTTPS stands for Hypertext Transfer Protocol Secure</span>
The email addresses or domains on a blacklist are automatically marked as spam in the inbox.
<h3>What is an email address?</h3>
A virtual address, which is unique in case of each individual and cannot be replicated for the purpose of sending and receiving mails and attachments, is known as an email address.
Hence, option A holds true regarding an email address.
Learn more about an email address here:
brainly.com/question/14714969
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