1 is false, waves can't propagate in a vacuum.
Answers A
Explanation:it’s a because it’s a
<span>The person who developed role theory to be used as a method to examine social relations was Robert Merton. Robert King Merton was a famous American sociologist. Most of his career was spent teaching at Columbia University. He was ranked as a University Professor.</span>
Italy's economy historically struggled due to poor unification between regions, with sicily and venetia, for example, having incredibly different economies that are minimally connected. furthermore, children would usually work the same jobs as their parents, leading to low social mobility and occupations of new jobs. in the future, italy's economy can improve with better unification and public education. cooperation between different industries across regions would be highly beneficial.
