Final answer:
A. Longer word length. The last column may be more challenging due to various factors like consonant blends, syllable complexity, longer words or irregular spellings, which can make spelling and pronunciation more difficult.
Step-by-step explanation:
The last column in the list may be more challenging than the first column due to the presence of consonant blends, the complexity of syllable structure, the use of irregular spellings, or the longer word length. Without the specific list, it's hard to determine which factor makes the last column more challenging. However, these factors typically increase the difficulty of spelling and pronunciation, contributing to the challenge students face when learning new words.
In English, consonant blends can be tricky because they require the pronunciation of two or more consonants in sequence without a vowel in between, and irregular spellings break the standard rules of English, making them harder to predict. Additionally, longer words often have a more complex syllable structure, increasing the difficulty for students in their reading and writing tasks.