With other workers of the same skills, workers formed a. strikes. c. trade unions. b. famines. d. prejudices.

The answer is C. Trade unions.

Explanation: Workers with the same skills can form trade unions in order to seek for better working conditions. Normally what they ask for is increase of wages, improvement of working security conditions, improvement of the different devices and supplies they requiered to develop they jobs, respect of their time and garantees of a steady job.

The deficit of involvement bond factor leads to risk behavior.

Explanation:

The Theory of Hirsch's social bond explains the effects of human behavior towards acting upon fulfilling the social task which helps all individuals to make one bonding relationship. Unless other types of human bonds, The involvement bond is required to tackle the critical situation of restricting any stages of risk level entering into the routine activities of human life.

For example, if the civic workers are not following the safety measures like wearing the mask in their mouth to protect themselves from the infectious diseases, it will lead to less involvement in ensuring their good health as they are dedicated themselves to cleaning all surfaces of the towns and cities. The absence of their involvement factor leads to arrival of risky situation of spreading diseases throughout the society.