Rural and unsophisticated are the best answers
1. Nearly 1/5 of the entire ocean floor has been discovered.
2. it is important that we map our ocean floors so that we understand more about our earth. Learning more about our earth can give us more information about life in the past.
Hope this helps :)
Lack, want, need, require as verbs all stress the absence of something desirable, important, or necessary. Lack means to be without or to have less than a desirable quantity of something: to lack courage, sufficient money, enough
