The answer would be the second option - From the tips of the root
This is because cell division, in higher plants, takes place in areas known as meristems, which are are
normally located at the tips of stems or roots. Since mitosis is the process of cell division, the best place to observe it would be at the meristems. A sample of the meristem can best be gotten from the tips of the root.
Continuing education is required and is available from a number of different sources
A cell is the smallest unit of life that can replicate independently. It is called the building blocks of life. A tissue is a material of which animals or plants are made. Hoped I helped. :)