Step 1: Understand the step taken by RBI:
The text says that the RBI reduced the Cash Reserve Ratio (CRR) by 100 basis points, that is, by 1 percentage point.
CRR is the share of the total deposits of a bank that it must keep with the RBI in cash. Banks cannot lend this part.
Step 2: Read the aim given in the text:
The text says the aim is to "improve the growth momentum by stimulating domestic private consumption and investment".
So the RBI wants people to spend more and firms to invest more.
Step 3: Find the likely cause:
A central bank tries to raise spending only when spending is too low. It means that aggregate demand is less than what the economy can produce.
This situation is called deficient demand. Prices may then fall or stay weak, which is the risk of deflation.
Output and jobs also slow down when demand is deficient, and this hurts the growth of the economy.
Step 4: Link the cause to the CRR cut:
A lower CRR leaves more money with banks to lend. Loans become easier to get, so households and firms can spend and invest more.
Hence the cut is a remedy for weak private demand.
Final Answer:
The RBI cut the CRR because private consumption and investment were weak. The economy faced deficient demand (a risk of deflation), and the RBI wanted to revive demand and growth.
\[ \boxed{\text{Cause = deficient demand, to be corrected by raising private consumption and investment}} \]