Cluster and Stratified Sampling

  E​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​xplain the differences between sampling methods? What factors should be considered when selectin​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​g sampling strategies? + Example?