Which of these statements can be used to described a chromosome?

Everyone knows about the human DNA and law of inheritance among these Chromosomes are thread like structures in thee Nucleus where DNA molecules are packed.

chromosomes are the building blocks of the human body as it is further divided into centro-mere which are also its arms. the shorter is S arm and the longer is its Q arm. the centro-mere being located in the structure gives it a specific shape.

Genetic drift decreases the genetic diversity within a specie's population. Genetic drift is a change in the allele frequencies due entirely to random chance and probability and is more likely to affect smaller populations and groups than larger ones. Genetic drift can also play a role in the development of a new species.

Cite my info:

https://www.nature.com/scitable/topicpage/the-genetic-variation-in-a-population-is-6526354/

https://socratic.org/questions/how-does-genetic-drift-affect-the-diversity-of-organisms-in-a-population