SQL Sever queries take most I/O

SELECT TOP 100
    (total_logical_reads + total_logical_writes) / qs.execution_count AS average_IO,
    (total_logical_reads + total_logical_writes) AS total_IO,
    qs.execution_count AS execution_count,
    SUBSTRING (qt.text,qs.statement_start_offset/2,
         (CASE WHEN qs.statement_end_offset = -1
            THEN LEN(CONVERT(NVARCHAR(MAX), qt.text)) * 2
          ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) AS indivudual_query,
    o.name AS object_name,
    DB_NAME(qt.dbid) AS database_name
FROM sys.dm_exec_query_stats qs
    CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as qt
    LEFT OUTER JOIN sys.objects o ON qt.objectid = o.object_id
WHERE qt.dbid = DB_ID()
ORDER BY average_IO DESC;