Answer:
Grinding or flaking of seeds is an effective method to achieve the high percent yield of oil from the seeds.
Grinding of seeds is an old method of oil extraction but it is still used due to its effectiveness and purity.
However, flaking is a modern method of oil extraction through machines. A flaking machine, presses the seeds hardly making them flat and increases the contact area of a seed, which in turn increases the oil extraction more effectively.
