Can anyone please help T^T

There are traits like blood type and eye color, and others like speaking english or having a scar. what are the terms used to describe these different types of traits? how are each defined?

What is it called when countries build lots of weapons to store and them in case of a war?

Heidi is a student of psychology at the university of arizona. she is currently involved in a research project to test the effects of sexual dominance on motherhood. heidi is most likely applying which psychological approach? humanism feminism behaviorism structuralism