The Act which specifically includes construction activities within its jurisdiction is 

Explanation:

1) Payment of Wages Act -1936:

• Regulates the timely and regular payment of wages to workers in factories and other industrial establishments.
• Mandates employers to maintain wage records and provide wage slips.

2) Trade Union Act -1926:

• Recognizes and protects trade unions, which represent workers in collective bargaining and other labor-related matters.
• Provides a framework for registration and legal status of trade unions.

3) Minimum Wages Act-1948:

• Establishes minimum wages for workers in various industries and occupations.
• Aims to prevent exploitation of workers and ensure a fair wage for their services.

4) Workmen’s Compensation Act -1923:

• Provides compensation to workers or their dependents in case of accidents, injuries, or occupational diseases arising from employment.
• Employer liability is established, regardless of fault, and benefits include medical expenses, disability payments, and death benefits.