Answer:
As mass increases, the time period increases.
Step-by-step explanation:
Let a block of mass m is attached to a spring of spring constant K is set into oscillations.
The time period of the oscillation is defined as the time taken by the system t complete one oscillation.
The formula for the time period of spring mass system is given by

where, m is the mass of the block and K is the spring constant.
If the mass of the block increases, the time period of the system also increases.