Affiliate Marketing Secrets

I am interested in obtaining search results showing a list of independent fitness retailers and gyms in the US. Is there a search term I can use to keep these results as niche and narrow as possible?

in marketing a term niche marketing is used. why is it important for a marketer to focus on a niche segment. explain with the help of an example.
P.S pls give a proper answer .. this question is going to come in my exam .. its a 10 marks question …. and plsss give a proper example too … very urgent …
thanks in advance 🙂

All of the populations of different species that occupy and are adapted to a given area are referred to by which term?
a. biosphere
b. community
c. ecosystem
d. niche
B, ?

2. What is the correct term for only the biotic factors in a tropical rain forest?
community
habitat
ecosystem
niche