The table below represents the consonant inventory of Breton. The symbol [ɥ] represents a labio-palatal approximant, and the symbol [x] represents a voiceless velar fricative. Consider the highlighted sounds.

  Bilabial Labiodental Dental Alveolar Postalveolar Palatal Velar
(Oral) Stop p b         t d     c ɟ k g
(Nasal) Stop   m           n       ɲ   ŋ
Trill               r            
Fricative     f v     s z ʃ ʒ     x  
Central approximant   w                   j ɥ    
Lateral
approximant 		              l            

Do the highlighted sounds above form a natural class?

Yes No

Try again. These sounds do not exclusively share the properties of voicing, place of articulation, or manner of articulation. Check to see if there is one or more sounds might also share these properties.

Correct! There is no feature or combination of features that these sounds share that are not shared with other sounds in the inventory.

Which one of these sounds will complete the natural class set if it were added to the list?

Incorrect. A natural class is the set of all sounds that share one or more features.

Correct! [f, s, ʃ, x] do form a natural class.

Now, from the menus below select the minimal number of features necessary to define the natural class.

Voicing: Place: Manner:

Reconsider 'voicing'.

Reconsider 'place'.

Reconsider 'manner'.