The significant pictures?

I am learning more and more about the way of life her in Tanzania and in particular in Mshiri Village where I live.  I am following a teach yourself Swahili course and there are real protocols in addressing people.  Who speaks first and the response you should give to the greeting.  The unfortunate thing for me is by the time I've spoken what I want to say they have gone passed and even if I rehearse what I'm going to say as they approach their response is different. It is all related to age, the time of day, whether your walking uphill or down hill. I've come to the conclusion if I mumble everything I know as they pass it seems to work. They keep you guessing  So I attach two pictures with this blog and provide a puzzle.   I would like you to identify the link between the two pictures and their significance.   You can comment on the blog.  I'm got to find some way of seeing if people are reading the blog. Very valuable prizes for the right response!!