1.3 A vowel is formed by letting air flow from the mouth without blocking it with any part of the mouth or throat.

TRUE OR FALSE
1.9 In contrast to what is stated in 1.3 above, explain how a consonant is formed.

False.

A vowel is formed by letting air flow from the mouth without blocking it with any part of the mouth or throat, while a consonant is formed by obstructing the air flow in some way using the tongue, lips, teeth, or throat. This obstruction creates sound.