How can the two chromosomes that make up a homologous pair differ?

a) they can contain different alleles for the same trait.

b) they can contain genes that code for different traits.

c) they can contain the same genes in different orders.

d) they cannot differ in any way when homologous.

They are homologous meaning they have the same genes in the same order but the actual sequences at some gene loci are slightly different, they are alleles.
so the answer is A: they contian different alleles for the same trait

 homologous means both of them have  same genes in the same order but the actual sequences at some gene loci are slightly different, they are alleles.the two chromosomes that make up a homologous pair differ as they can contain different alleles for the same trait.

Tamarind can be grown on homesteads, plantations, and wasteland or as a forest tree. methods of propagating tamarind there are two methods of propagating tamarind trees: seed propagation and vegetative propagation. seed propagation: it involves the collection, preparation and direct planting of the seed.answer from google full credit to google.