Q1. What are CSS combinators?

Combinators define relationships between selectors: descendant (space), child (>), adjacent sibling (+), general sibling (~).

Q2. What does descendant selector do?

div p selects all p elements anywhere inside div (any nesting level).

Q3. What is child selector?

div > p selects only p elements that are direct children of div.

Q4. What is adjacent sibling selector?

h2 + p selects the first p element immediately after h2 (same parent).

Q5. What is general sibling selector?

h2 ~ p selects all p elements that are siblings after h2 (any position).