Limestone and clay metamorphosed into?

Limestone and clay can undergo a process called metamorphism, which means they can change their form due to heat and pressure deep within the Earth's crust. When limestone and clay undergo metamorphism, they can transform into different rocks.

In this question, the options are marble and gneiss, marble and slate, graphite and quartzite, and graphite and gypsum.

Marble is a type of rock that forms from limestone during metamorphism. It has a beautiful, smooth texture and is often used in buildings and sculptures. Slate, on the other hand, is another rock that can form from clay during metamorphism. It has a layered appearance and is often used as a roofing material.

So, the correct answer to this question is Option B: marble and slate. When limestone and clay undergo metamorphism, they can transform into marble and slate respectively.

It's important to remember that metamorphism is a natural process that takes place over millions of years. It occurs deep within the Earth's crust where there is a lot of heat and pressure. This process can result in the formation of many different types of rocks, each with its own unique characteristics.

In summary, when limestone and clay undergo metamorphism, they can change into different rocks. In this case, the correct answer is marble and slate.