Explanation

Bone is the hardest and most rigid connective tissue in the body.

It provides structural support and protection to organs.

Explanation

UNICEF stands for: United National international children's emergency fund

UNICEF: a United Nations agency

UNICEF: responsible for providing humanitarian and developmental aid to children worldwide.

    UNICEF works in more than 192 countries and territories

    UNICEF Formed: 11 December 1946

Explanation

Finger : Ring :: Neck : Necklace.

A ring is an ornament worn on a finger.

A necklace is an ornament worn on a neck.

Explanation

Explanation

The subject is Saima (female), so the pronoun should be her, not his.

Correct sentence: Neither Saima nor her friends were able to attend the theory class this morning.

Explanation

The term fluids refers to both liquids and gases, as they can flow.

Liquids specifically are also classified under fluids because of their ability to take the shape of a container.

Explanation

A red object reflects only red light.

A blue glass absorbs red light, so no light passes through → the object looks black.

Explanation

Displacement is the change in position of a body in a specific direction (a vector quantity).

Distance is the total path covered without considering direction.

Explanation

A liquid boils at its boiling point, where its vapor pressure equals the external atmospheric pressure.

Melting point is for solid → liquid change, not boiling.

Explanation

In a neutral atom, the number of protons = electrons, ensuring electrical neutrality.

Protons are not always equal to neutrons or nucleons (protons + neutrons).