Pavlov's dog Rex drooled heavily at the sight of a blue dog food bowl. Pavlov used extinction to stop the salivating. Two weeks later, however, Rex began to salivate again at the sight of the blue bowl. This is an example of:

Spontaneous recovery

Explanation:

Spontaneous recovery is a term associated with learning and conditioning. Specifically, spontaneous recovery is the reappearance of a response (a Conditioned Response; CR) that had been extinguished. The recovery can occur after a period of non-exposure to the Conditioned Stimulus (CS).

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj

well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.