I am sorry about that this is the correct answer
The discovery that certain plants that are poisonous when raw can be made safe through cooking likely occurred through trial and error over thousands of years of human history. Early humans were hunter-gatherers who had to rely on their knowledge of the natural world to survive. They likely experimented with different plants and animals as sources of food, discovering which ones were safe to eat and which ones were not through trial and error.

Over time, humans developed methods of cooking and processing food that allowed them to make otherwise poisonous plants safe to eat. For example, boiling or roasting certain plants can break down toxins and render them harmless. This knowledge would have been passed down from generation to generation through oral tradition.

In many cases, people in the past may have learned about the toxicity of certain plants through unfortunate accidents. For example, a member of a group might have become ill or died after eating a certain plant, leading the others to avoid it or experiment with ways of making it safe.

As human societies developed and became more complex, people began to share knowledge and techniques for preparing food through trade and cultural exchange. This allowed for the spread of knowledge about the preparation of poisonous plants and other food sources across different cultures and regions.

Today, scientists have identified many of the toxins present in various plants and have developed methods of testing and identifying poisonous substances. However, the basic knowledge of how to safely prepare certain plants for consumption likely originated through the experience and experimentation of early humans.
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