OSHA has identified four categories of hazards that account

OSHA has identified four categories of hazards that account for more than 50% of all construction fatalities: Falls (36.5%),Struck by object (10.1%)
Electrocutions (8.6%), and Caught-in/between (2.5%)

OSHA has identified four categories of hazards that account

OSHA has identified four categories of hazards that account for more than 50% of all construction fatalities:
Firstly, Falls (36.5%)

Secondly, Struck by object (10.1%)

Thirdly, Electrocutions (8.6%)

Fourthly, Caught-in/between (2.5%)

The assignment is to write a research paper involving one of these four construction hazard categories. You may narrow your topic down to a more specific type of accident within the major category. For example, under falls, you could focus your research on falls from ladders. When writing the paper, consider the following questions:

Firstly, What are the common causative factors?

Secondly, What does data indicate?

Thirdly, What are the effective proven corrective measures?

The submission must be a minimum of three pages in length, not including the title page or reference page.  Use a minimum of three scholarly reference sources from the CSU Online Library. Scholarly sources include:

Peer-reviewed journal articles (Click here to access a webinar outlining peer-reviewed articles.) safety reference books and textbooks, and other publications by safety professionals and organizations (print or online).

Note that wikipedia.com, answers.com, ask.com, about.com, and similar broad-based Internet sites are not considered scholarly sources.

Use government and professional safety-related sources, such as osha.gov, niosh.gov, asse.org, nsc.org, and nfpa.org. Contact your professor if you have any questions about the validity of a reference source.

Be sure to use in-text citations for direct quotes and paraphrased information.

More details;

What is OSHA and what does it mean?
OSHA means the Federal Occupational Safety and Health Administration or the State agency responsible under a Plan approved under section 18 of the Act for the enforcement of occupational safety and health standards in that State.