The transition at the beginning of the second paragraph (""but even"") marks the passage’s shift to a presentation of a.

I’m gonna guess without the picture to influence people to join the army

No one will ever know..

Frequency is the number of complete oscillations of a wave per second.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.