Yes those spaces can be closed don't worry abt that.there are many methods available like ,we can move the teeth naturally with the help of braces to a desired position,( more time consuming,best and natural way) can cover the space by giving caps above the existing teeth ( less time consuming but have to reduce the existing tooth size)or like venners n which a small portion of teeth is drimmed and thos space are covered by caps.braces treatment can range from 18-90k depending on which material u select for braces like metal, ceramic or aligners.caps can range from 2.5-15k  per cap depending on the material and brands like metal ceramic or pure ceramic.venners also Wil start from 5k

Spaces between teeth reduces chewing efficiency and increases food lodgement. consult an orthodontist. Their expertise to move teeth would surely help you. Treatment charges depends on what type of treatment you opt.

Spaces between teeth can be corrected or minimized.There are variety of treatment modalities like orthodontic treatment,veneers etc and the time duration and cost varies accordingly.It needs to be seen clinically to judge what would be the best option for you.