Labour rights activities claimed the number of "mortalities" in the is much higher than the official count- ( select the best expression of the quoted word) ?

In the context of discussing labor rights activities, the term "mortalities" refers to deaths or losses of life that occur during work-related incidents or situations affecting workers. Among the options provided, "casualties" is the most appropriate expression to substitute for "mortalities."

"Casualties" encompasses not only fatalities but can also refer to injured or affected individuals in a broader sense, making it a suitable term in discussions about labor rights and workplace incidents. In contrast, the other options"refuges," "celebrities," and "tenant"do not align with the theme of deaths or injuries.

"Refuges" pertains to safe havens or shelters; "celebrities" refers to famous individuals, while "tenant" relates to someone who rents property. Therefore, "casualties" accurately captures the serious nature of worker fatalities and injuries that labor rights activities might seek to address, highlighting the urgent need for accurate statistics and improved protection for workers. This makes it the best choice among the provided options.