The branch of Phonetics that focuses how speech sounds are produced in our speech organ

In producing consonants, we should think about these features, except from

The sounds [f] and [v] are produced by using the upper teeth and

The sounds [n], [t], [l], [z] and ...... are produced by using the tongue tip to alveolar ridge.

The sound [ $\theta$ ] we can find in the the words:  

The sound [i:]  is found in the the word

The diphthong  [au] can be found in the  words:  

Two kinds of words showing the difference in spelling and meaning but having the same pronunciation are called

In the first part  of the following words,  we can find the kinds of consonants that  belong to Nasals.