Which is not one of the three main types of migration

What is the role of institutions in society - do they perform positive functions, or simply work in the interests of the powerful and against the powerless? (a related question here is why do our life chances vary by class, gender and ethnicity)

Using the charts above which of the following matches the people with the set of laws they created

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25