Explanation:

- Intricate means something that is very detailed or complicated in design or structure.

- Let's evaluate the options:

- Option 1: Complex

- A system or object that is made up of many interrelated parts, often complicated.

- This is a suitable synonym for intricate.

- Option 2: Complete

- Whole or having all necessary parts, but not necessarily complicated.

- Not directly related to intricate.

- Option 3: Connected

- Linked or joined together.

- Related to a network or relationship but not necessarily intricate.

- Option 4: Colorful

- Having bright vivid colors; not related to complexity or detail.

- Therefore, the correct synonym for intricate is:

- Option 1: Complex