Answer:
The correct option is D.
Explanation:
Prokaryotes are divided into two types of domains known as Archaea and Bacteria. They are defined as the smallest form of life, most of them are single-celled but some are multi-cell in structures.
Some prokaryotes such as Bacteria belong to a very diverse group and depending on the species, they contain different shapes, for example, spherical (cocci), spiral (spirilla), rod (bacilli), etc. Some prokaryotes such as Archaea live in some extreme environmental conditions such as:
1) Extreme thermophiles live in places like hot springs.
2) Extreme halophiles live in high saline water content.
3) Methanogens live in swamps like places.
