Population refers to an array of organisms of the similar species, which thrives in a particular geographical region and interbreed. The three main characteristics of a population are density, size, and dispersion.
The density signifies towards how many organisms are thriving in a specific region. The size refers to how big a population is, and dispersion signifies towards the degree of spreading of the particular population.
The empress of India during this period; the so called Sepoy Rebellion was Queen Victoria of the British Empire, who was now also consequently the queen of India.
Her reign was a very specific and characteristic rule where she enforced different rules and made different changes to the everyday life of people.