Answer:
Well the question is incomplete, the options are:
a) By diversifying your investments
b) By making only medium risk investments
c) By putting all money in savings account
The correct answer will be,
a) By diversifying your investments.
The other two options are of no use because you can not maintain a balance between high risk and low risk by just making the medium risk investment or just by putting the money in savings account, hence in order to create a balance, diversification is necessary.