The first statement is the most accurate and comprehensive explanation of how activities and celebrations promote the cultural diversity and history of Black Americans in Texas:
"Because Black Texans live and work across the state, many events and celebrations in local communities and at the state level honor their history and heritage."
This statement acknowledges the widespread presence of Black Texans and emphasizes that various events are organized to celebrate and honor their contributions and culture, reflecting the diversity within the state's history. The other options either downplay the significance of such events, narrow the scope of celebration to specific times or events, or propose that such activities are hard to find, which does not accurately represent the reality of cultural celebrations in Texas.