[[1]] are the sources of grains, cereals, vegetables, and fruits.

Plants are the sources of grains, cereals, vegetables, and fruits.

As plants are the major source of food on Earth, all organisms depend on plants directly or indirectly for food. 

We obtain the majority of our food products from different edible parts of plants. Plants provide us with products like fruits (mango, banana, etc.), vegetables (brinjal, potato, etc.), grains (pulses, beans, etc.), and cereals (rice, wheat, oats, etc.).