The correct answer is 4)B, D and E only.

Labour laws enable workers to protect their rights in the following ways:

B. Protection of wages: Labour laws ensure that workers receive fair wages for their work and that their wages are not unlawfully withheld or reduced.

D. Redress of grievances (compensation for loss): Labour laws provide mechanisms for workers to seek compensation for any losses or damages they may suffer due to violations of their rights or unfair treatment by employers.

E. Right to organise and form trade unions: Labour laws protect the right of workers to form trade unions and engage in collective bargaining with employers to negotiate better working conditions, wages, and benefits.

Options A and C are incorrect because providing more holidays and unemployment allowances are not directly related to protecting workers' rights under labour laws.