All the given options are true. Factors responsible for inequality include differences in abilities and talents, in education and training, preferences for work and leisure and for low-paying but safe jobs relative to high paying but dangerous jobs.
Work Step by Step
Income inequalities arise due to differences in abilities and talents among the people. Each person may be differently educated and trained and possess a different set of abilities that he/she has acquired as a process of education. People also choose between leisure and work hours that they wish to do. Some people wish to spend more time with family and children and thus wish to work less. Also, not everyone wishes to take risks. Risks, sometimes, provide greater fortune to a person than avoiding it and going on with a less-paying job.