**Plants give us food grains. What are the examples of such grains?**

**Explanation:**

Food grains are a type of staple crop that is cultivated and harvested for human consumption. They are an essential part of our diet and provide us with important nutrients such as carbohydrates, proteins, and vitamins. Some examples of such food grains include:

**a) Wheat and Rice:**
- Wheat and rice are two of the most important food grains in the world.
- Wheat is a cereal grain that is commonly ground into flour and used to make bread, pasta, and other baked goods.
- Rice is a staple food for a large portion of the world's population, particularly in Asia. It is a versatile grain that can be cooked and consumed in various ways.

**b) Maize and Barley:**
- Maize, also known as corn, is a widely cultivated grain that is used for both human and animal consumption.
- It is often ground into cornmeal or corn flour and used in a variety of dishes including tortillas, cornbread, and polenta.
- Barley is another cereal grain that is commonly used in the production of beer and other alcoholic beverages.
- It can also be used as a food grain and is often added to soups, stews, and salads.

**c) Gram and Pulses:**
- Gram refers to a variety of legumes that are commonly consumed as food grains.
- Chickpeas, also known as garbanzo beans, are a type of gram that is widely used in Middle Eastern and Indian cuisine.
- Pulses are a subgroup of legumes that includes lentils, beans, and peas.
- These food grains are rich in protein and are an important source of nutrition, particularly for vegetarians and vegans.

**d) All of these:**
- The correct answer is option 'D' because all of the mentioned food grains - wheat, rice, maize, barley, gram, and pulses - are examples of food grains that are obtained from plants.
- These food grains play a crucial role in providing sustenance and nutrition to human beings.

In conclusion, plants provide us with a variety of food grains that form an essential part of our diet. From wheat and rice to maize and barley, these grains are cultivated and harvested for human consumption, providing us with important nutrients and fulfilling our dietary needs.