Answer to Question 1
Answer: Consonant digraphs: two consonant letters that represent one sound that is different from either consonant sound (ch, gh, ph, sh, th, wh)
Consonant blends (Clusters): Two or more consonant letters whose sounds are blended together (s + t = st)
Vowel diphthongs: Two vowel letters whose sounds are blended together (oi as in boil, oy as in toy, ou as in shout, ow as in cow)
Vowel digraphs: Two vowel letters that represent one vowel sound (ai as in paid, ay as in say, eat as in meat, ee as in meet, oa as in boat, ow as in grown, ew as in new)
Answer to Question 2
D