Based on your exploration, what might cause variations in dialect among speakers from the same region? check all of the boxes that apply. gender differences different ethnic backgrounds english spoken as a second language educational or occupational differences geographical differences within a state

The right answers are "different ethnic backgrounds", "educational or occupational differences"  and "geographical differences within a state".

Here is a brief explanation on this:

Language is dynamic and subject to numerous variations. This peculiarity of each and every language is what we call linguistic variation, which is subject to the historical, geographical and sociocultural context in which the speakers are integrated.

This plurality of language is easily observed in Brazil, a country of significant territorial extension and cultural multiplicity. Linguistic variations occur because, since the primary function of language is communication, speakers arrange and rearrange language according to the need for social interaction.

the reason some people sacrifice their own life for another person's life could be that they are in love with them and would do anything to keep them safe a protected even if that means risking their life in the process

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.