Answer:
A Organic
Step-by-step explanation:
The branch of science that applies to substances containing carbon is called organic chemistry (A). Organic chemistry focuses on the study of carbon compounds, including their structure, properties, composition, reactions, and synthesis.
Carbon is a unique element that forms the backbone of numerous molecules found in living organisms, such as proteins, carbohydrates, lipids, and nucleic acids. These compounds are vital to life and play essential roles in biological processes.
Organic chemistry is widely applicable and is used in various fields, including pharmaceuticals, materials science, agriculture, and biochemistry. It helps in the development of new drugs, understanding chemical reactions in living systems, designing new materials, and analyzing environmental pollutants.
In contrast, inorganic chemistry (D) deals with the study of non-carbon compounds, such as metals, minerals, and non-living matter. Structural chemistry (B) focuses on the study of the structure and arrangement of atoms within molecules, while environmental chemistry (C) deals with the study of chemical processes in the environment.
To summarize, the branch of science that specifically studies substances containing carbon is called organic chemistry. It is a broad and important field that explores the unique properties and reactions of carbon compounds, which are crucial to many aspects of life and scientific research.