In which chemical weathering process do iron minerals react with oxygen?

Here are the answers to the questions you've sent:

1.3 The question asks about a chemical weathering process where iron minerals react. Although the question is cut off, the reaction of iron minerals with oxygen is known as oxidation.
The correct option is D.

• D) oxidation

1.4 Biological weathering involves living organisms breaking down rocks.
The correct option is D.

• D) Plants and animals break up the rock.

1.5 To identify the chemical weathering process in Picture B, the picture itself is required. Since Picture B is not provided in the image, I cannot answer this question.

1.6 To identify the chemical weathering process in Picture C, the picture itself is required. Since Picture C is not provided in the image, I cannot answer this question.