Explanation:

The first statement is incorrect. Chemical activity generally increases with higher temperatures. In the context of chemical reactions, including those in the natural environment, higher temperatures often accelerate the rate of chemical reactions. This is a fundamental principle in chemistry known as the Arrhenius equation, which shows that reaction rates increase with rising temperature.

The second statement is correct. Weathering is indeed an in-situ process, meaning it occurs at the place where the rock or material is located. It involves the breaking down or alteration of rocks and minerals on the Earth's surface through physical, chemical, or biological processes without movement of the material.

The third statement is correct. The hot magma in the interior of the Earth is a fundamental source of all minerals. Magma, when it cools and solidifies, forms igneous rocks, which are primary sources of many minerals. These minerals can then be broken down and reformed into other types of rocks (sedimentary and metamorphic) through various geological processes.

Therefore, statements 2 and 3 are correct.