Question

The first link to any food chain is a green plant because
(A) They are fixed in one place.
(B) They alone have the capacity to synthesize food.
(C) They can eat everything.
(D) They respire.

Answer 1

Hint: Plants are autotrophs, which suggests they produce their own food. Plants use the method of photosynthesis to convert the water, sunlight, and ${ CO }_{ 2 }$ into oxygen, and simple sugars that the plant can easily use as fuel.

Complete answer:
Producers, like green plants, are organisms that utilize solar or energy to synthesize starch. All food chains must start with a producer. Producers also referred to as autotrophs, make their own food. they create up the primary level of each food chain. Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use photosynthesis to make food (glucose) from sunlight, ${ CO }_{ 2 }$, and water.
The primary producers can easily convert the energy which is present in the light or the energy which is in inorganic chemical compounds to create organic molecules, which is typically accumulated within the kind of biomass and can be used as carbon and energy source by other organisms (e.g. heterotrophs and mixotrophs). The photoautotrophs are commonly known to be the first primary producers, which will be helping in converting the energy of the sunshine into energy through photosynthesis, ultimately building organic molecules by using the ${ CO }_{ 2 }$, an inorganic carbon source. The examples of chemolithotrophs are some types of archaea and bacteria (unicellular organisms) that produce biomass from the oxidation of inorganic chemical compounds, these organisms are called chemoautotrophs, and are frequently found in hydrothermal vents within the deep ocean. Primary producers are at the lowest trophic level and are the explanations why Earth is sustainable for life to this day.

So, the correct answer is ‘They alone have the capacity to synthesize food.’

Note:
There are many various sorts of primary producers out in the Earth's ecosystem at different states. Fungi and other organisms that gain their biomass from oxidizing organic materials are called decomposers and aren't primary producers.