scientists have discovered pigeonshave magnetite in their head what would be the reason for this?

Question

a-pigeons eat stones and dirt
b-pigeons use the magnetic particles to attract mates
c-pigeons find their food using particles
d-they use it like a compass

Answer 1

They use it as a compass to always know where they are going. Which is why they are good at racing. They can always find their way home.

Answer 2

Kinetically speaking it acts as a "gyroscope." The pigeons are able to "hone" in on location almost like a compass affect.