Solution: In sexually reproducing flowers the male (pollen grains) need to meet the female gamete (ovule). So, for the fusion of the male and female gamete, the pollen grains must reach the stigma, and this is called pollination. Pollination is the method of transfer of the pollen grains to the female part of the flower.

After pollination the pollen grains reach the ovules and fertilize them, so, this process is known as fertilization.

The fusion of male and female gametes leads to the formation of a zygote, which divides and forms multiple celled structures called the embryo.

The embryo after growing and fully developing forms the seeds.

So, the correct sequence is pollination, fertilization, embryo, seedling. The correct answer is (c) pollination, fertilization, embryo, seedling.