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Priyanka DumkaPriyanka Dumka 

how future method helpful in re101 error

How future method is helpful in resolving 101 error. 
SwethaSwetha (Salesforce Developers) 
HI Priyanka,
Apex written within an asynchronous method gets its own independent set of higher governor limits. For example, the number of SOQL queries doubles from 100 to 200 when using asynchronous calls. The total heap size and maximum CPU time are similarly larger for asynchronous calls.

Reference:https://www.apexhours.com/too-many-soql-queries-101/

If this information helps, please mark the answer as best. Thank you