Final answer:
The correct capitalization of 'fungi' depends on its usage; 'Fungi' when referring to the kingdom in scientific context, and 'fungi' in general conversation or non-scientific texts.
Step-by-step explanation:
Regarding the capitalization of the word "fungi," the correct statement is that it depends on its usage in a sentence. When referring to the kingdom in a scientific context, such as in scientific papers or taxonomy, the term Fungi is capitalized as part of the formal name. However, when used in general conversation or within the context of a non-scientific text, it should be written in lowercase as "fungi." It's important to note that specific guidance for scientific writing may suggest using italics for the names of taxonomic ranks above the level of genus, which includes the kingdom.