Explanation:

- Integrated Child Development Services (ICDS) is a government program in India.

- It aims to provide food, preschool education, and healthcare to children.

- The focus is on children who are under 6 years old.

- The program supports pregnant women and lactating mothers too.

Option 1: 0 – 6 years

- Correct. The ICDS targets this age group.

Option 2: 0 – 3 years

- Only partially correct. While this includes part of the beneficiaries, it does not cover the entire group.

Option 3: 3 – 6 years

- Also partially correct. It covers the latter part of the child age group but misses younger children.

Option 4: 6 – 15 years

- Incorrect. The ICDS does not cover this age group.