All the alleles of a gene or genes present in a given individual.

Genotype

Explanation:

Genotype refers to the genetic constitution of an individual. It represents all the allele combinations of a particular gene or alleles of various genes present in the genome of the organisms and constitutes the genetic makeup of an individual. For instance, if an individual has I^A and I^B allele for ABO blood type, the genotype of the individual for the ABO blood type gene is "I^A I^B". Likewise, "TT" and "tt" represent the genotype of a pea plant having both the same type of alleles for the stem height gene.  

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.

i believe the correct answer is d