Anna is working on finding the patterns of demographic variation within north america’s populations.  what is anna working on? a.  population structureb.  population sizec.  population densityd.  population growth

Quick she's working on population structure. Demographics is the study of  population variation. It is almost redundant.

It is not size, because she's finding how populations change with location and what influences that change (like water).

Population density is an entirely different topic. That tells how many people live in a unit of measurement. Usually is the number of people per square mile or square km.

Again growth is a different idea. This describes how fast something is increasing or decreasing.

i think the answer is gold im not entirely sure

transformative rocks are the stones that emerge from the transformation of existing rock composes in a procedure called changeability, implies changing of structures. transformative rocks are shaped from alternate shakes that are changing a result of warmth or weight connected. one of this model is the earth developments that making rocks profoundly cover or crushed which will make the stones warmed and put under awesome weight. they are not softening but rather the minerals they are containing are changed synthetically that will shape transformative rocks. now and again different rocks are shaped when the others are near some liquid magma and getting warmed.