请英语好的大神帮我翻译一下这两句话!谢谢!

the main focus of your question depends on who in the phrase 'the strategies will differ depending upon who they are seeking to communicate with. '
whom, indeed , is a more accurate description to 'who'.
in this phrase whom means the customers.
I can rephrase the sentence ' maybe concentrate upon a certain sector (retail companies for example) as the strategies will differ depending upon who they are seeking to communicate with. ' into
' maybe concentrate more on a certain sector (retail companies for example) as they may use different communcation strategies depending on the types of customers.