PLEASE HELP!! Larissa is making sautéed purple cabbage. First, she washes and cuts the cabbage into long thin strands. Then, she puts a pan on the stove and adds butter. She allows the butter to melt and turn to liquid. Next, she adds the cabbage to the butter, sprinkles some salt on it, and stirs it. Larissa watches as the cabbage sizzles, releases steam, and softens. To finish the side dish, she adds a squeeze of lemon juice to it, which causes it to change from purple to pink. Finally, Larissa empties the cabbage into a bowl and puts it on the dinner table.

Which of the events involves a chemical reaction?

Larissa empties the cabbage into a bowl and puts it on the dinner table.
Larissa watches as the cabbage sizzles, releases steam, and softens.
Larissa adds butter to a pan and allows it to melt and turn to liquid.
Larissa adds the cabbage to the butter with a sprinkle of salt and stirs it.
Larissa washes and cuts some purple cabbage into long thin strands.
Larissa adds a squeeze of lemon juice to the cabbage, and it turns pink.