Which of the following is an example of a consonant blend?

A consonant blend consists of two or more consonant sounds that are pronounced together without any vowels in between, allowing each consonant to keep its individual sound. The combination "bl" exemplifies this, as it combines the sounds of 'b' and 'l' to create a single blended sound that occurs at the beginning of words, such as “black” or “blue.”

The other options listed do not represent consonant blends. "th" is a digraph, producing a single sound (as in "think" or "that") rather than retaining the distinct sounds of both consonants. "ch" also functions as a digraph that represents a unique sound, similar to "ch" in "chair." Lastly, "ea" is a vowel team that typically represents a vowel sound, rather than a blend of consonants. Therefore, "bl" stands out as the correct example of a consonant blend.