Answer:
The heterochromatin refers to a condense packed form of DNA and is categorized into two types as facultative and constitutive heterochromatin. These kinds of heterochromatin perform an essential function in the expression of genes.
The distinguishing characteristic of heterochromatin is the prevalence of genetically inactive sequences that are called satellite sequences. Therefore, it generally comprises the repetitive sequences of DNA. The distinct examples of heterochromatin are telomere, centromere, and repetitive DNA. Hence, all the given options are correct.
