Fertilization occurs within theMultiple Choicefollicle.uterine tube.vagina.uterus.

To answer the question regarding where fertilization occurs, we need to analyze the options provided.

1. Follicle: This is a structure in the ovary that contains an egg and is involved in the maturation of the egg but is not the site of fertilization.

2. Uterine Tube: Also known as the fallopian tube, this is the structure where fertilization occurs. After ovulation, the egg is captured by the fimbriae and transported through the tube, where sperm can encounter it.

3. Vagina: This is the canal leading from the external genitals to the cervix of the uterus but is not where fertilization takes place.

4. Uterus: While the uterus is essential for implantation of the fertilized egg, fertilization itself does not occur here.

Final Answer

Fertilization occurs within the uterine tube.