Which sentence is useful for practice because it includes every letter of the alphabet?

The sentence "A quick brown fox jumps over the lazy dog" is particularly useful for practicing calligraphy because it is a well-known pangram, meaning it contains every letter of the English alphabet at least once. This characteristic makes it ideal for calligraphy practice, as it allows the student to work on all the letters and develop their skills in a systematic way.

Practicing with this sentence can help improve not only the student's letter formation but also their speed and fluidity, as it encourages the calligrapher to navigate through various shapes and strokes of different letters all in one go. This enhances familiarity with the entire alphabet, which is crucial for anyone looking to master calligraphy. The diversity of letters ensures that students can focus on both their strengths and weaknesses in letter formation.

In comparison, the other sentences, while interesting and useful in their own right, lack coverage of all 26 letters of the alphabet. Therefore, they wouldn't provide the comprehensive practice that a pangram like this one offers.