The apple lands on the soil. The fruit rots away, leaving the seed.
Once the blossom has been pollinated the flower will develop into an apple. When the apple is ripe we can either eat it, or let the apple rot away and let the seeds grow a new tree.
After 4 or 5 years the tree will be big enough to produce blossom in the spring. These will be pollinated by insects or birds.
The apple seed germinates after about 6 weeks. The young apple tree is called a seedling.