Which keywords would be most effective to find research on the development of a cure for slowing down or decelerating human aging?agingold and researchaging and development and peopleaging and research and cure.

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.

No, mark me ! ((brainliest))

Ihad to break up with a girl one time i almost cried a whole week oh you had to break up for a pretty good reason