How does the rate of cooling affect the size of mineral grains? ?

When things are cold they contract making them smaller and when they are hot they expand making them bigger. Idk if this is what u are looking for but I hope it helps

The correct answer is b, social stratification is needed for a society to exist. marxist theory regarding social stratification is that due to the differing economic capacities among people in society, a natural separation occurs between those that own the means of production and those that sell their labour in the production chain. 

Answerthe ability to use knowledge and skills to manage financial resources effectively