Yes, if both horses are heterozygous (Ss) then they can produce a horse with curly hair. They each carry the recessive allele for curly hair and if they both pass this on to their offspring, it will have curly hair.
Ex with different letters below.
rr would be curly or in this case, ss
The correct option is A.
Parallax refers to the phenomenon in which there is apparent displacement in the position of an object that is viewed along two different lines of sight. Due to the phenomenon of parallax, the stars that are farther away seem to move very slowly compare to those that are near.