What speakers are selected on Juneteenth and why? What topics do they speak about?

Juneteenth commemorates the ending of slavery in the United States. The event dates back to June 19, 1865, when Union soldiers arrived at Galveston, Texas, with news that the war had ended and that the enslaved were free. This was more than two years after President Lincoln’s Emancipation Proclamation, which had become official Jan. 1, 1863. the speakers include important people in the time. these speakers will discuss cultural events throughout the times we are living in

Explanation:

don't know if this is helpful or not but this is what I could find

the weather is usually good on june, so cookouts are popuar at these juneteenth celebrations. people gather around open-pit, barbacues and almost every community have their owns style to make barbecued beef or pork. since beef and pork were not traditionally availabe every day and communities of freed enslaved people, this was a special treat. warms summers also are great for drinking cold strawberry soda, also historically also popular in these communities

Explanation:

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d. it adversely affected american productivity