Fertilization occurs when sperm swim to an egg inside an archegonium.
When a sperm cell fertilizes an egg cell, a fertilized egg or zygote is formed.
Sperm swim to an egg, forming a zygote inside an archegonium.
Where is a zygote formed by sperm swimming to an egg?

[A] colder and wetter
[B] ocean water
[C] graptolites
[D] rapid expansion
[E] a delta
[F] an archegonium
[G] barnacles
[H] an organism's body