Answer:
<u>1</u><u>)</u><u>Amplitude</u>
<u>2</u><u>)</u><u>Modulation</u>
<u>3</u><u>)</u><u>Frequency</u><u> </u>
<u>4</u><u>)</u><u>Modulation</u>
I haven't seen anything but cowardice and expediency.
Answer:
You can add how mirrors are made, when they were first invented and by who invented them.
