What evidence is there that the colonist had already unsuccessfully voiced concerns to the king? ( in the Declaration of Independence)

Please read the Declaration of Independence. The answer to this question is obvious.

http://www.ushistory.org/declaration/document/

I bet .... why would I ask

I suspect you asked because you haven't read the Declaration.

Look at the sections beginning "He has".

See my answer below. We are not going to do your homework for you. We'll be glad to check your answer(s)

To find evidence within the Declaration of Independence that indicates the colonists had already unsuccessfully voiced their concerns to the king, you can read the text itself. Look for specific passages or statements that suggest the colonists had tried to communicate with the king but were unsuccessful. Here's how you can locate such evidence:

1. Access the Declaration of Independence: Start by finding a reliable source that provides the full text of the Declaration of Independence. This can be done by searching online or using a book or educational resource that contains the document.

2. Read the text: Begin reading the entire document carefully and attentively. While doing so, keep an eye out for any references or statements that might indicate the colonists had attempted to communicate with the king.

3. Look for specific phrases or grievances: Pay close attention to passages that highlight the colonists' grievances and reasons for seeking independence. Seek out statements that describe the actions of the king, such as ignoring the colonists' petitions or failing to address their concerns.

4. Analyze the language used: Scrutinize the wording and tone of the document. Look for phrases that suggest frustration or dissatisfaction with the king's responses (or lack thereof). Also, note if the document mentions any prior attempts by the colonists to seek redress.

5. Consider the overall context: Reflect on the broader historical context surrounding the Declaration of Independence. Remember that it was written after years of escalating tensions between the American colonies and the British monarch, King George III. Take into account events such as the Boston Tea Party, the Intolerable Acts, and the First Continental Congress, which might have influenced the colonists' decision to declare independence.

By following these steps, you should be able to identify passages or statements that support the conclusion that the colonists had already unsuccessfully voiced concerns to the king.