Manual focus might or might not be important. Very few subjects give you time to photograph them.
Anticipation is a good answer. Mosts sports photos are taken because the cameraman/woman is either a good editor or he/she understands the game well enough to know what will happen.
I don't know that people have to know who you are especially if you are taking pictures of animals or vegetation.
I have enough doubt that you can't pick the last one. So B.
There really is not a certain person who introduced it but it did start in the Bronx in
New York.
If you are a producer, you make the items, if you are a consumer, you consume them.
