The answer to this question is 3-D references.
3-D references usually contain same cell range on several different sheets. A 3-D reference is often used so sveral worksheets could follow a certain pattern when you put same data. This will make you able to input it faster rather than have to do it over and over again.
Salinization is the increase of salt content in soil which will often hinder farmers crops.
Answer: decide whether a string of letters is a word or a non-word.
Explanation:
Migration changes the population of a place, therefore, the distribution of the population is uneven in the country. Migration increased the slum areas in cities which increase many problems such as unhygienic conditions, crime, pollution etc. so, unmanaged migration can be a Great threat in population management.