Step 1: Understanding vaccination.
Vaccination at the appropriate time provides immunity to diseases and helps protect children from preventable illnesses, thereby reducing the rate of child mortality.
Step 2: Analyzing the options.
- (A) Decreases immunity: This is incorrect. Vaccination increases immunity, not decreases it.
- (B) Decreases rate of child mortality: This is correct. Vaccines help prevent deadly diseases, thereby reducing the rate of mortality in children.
- (C) Insecurities child's life: This is incorrect. Vaccination helps secure a child's life, not make it insecure.
- (D) None of these: This is incorrect, as the correct answer is (B).
Step 3: Conclusion.
The correct answer is (B) decreases rate of child mortality, as vaccination plays a critical role in reducing child mortality.
Final Answer:
The correct answer is (B) decreases rate of child mortality.