Answer:
Mutual leadership is a team dynamic where members quickly claim project roles based on skills and expertise
"The house doesn't have a basement" is the the sentence that uses the correct form of the verb.
The verb ser is conjugated accordingly:
yo: soy
tu: eres
el/ella/usted: es
nosotros: somos
vosotros: sois
ellos/ellas/ustedes: son
Two circumstances are when describing your job/occupation and describing anything in general.
What are the options? Grammar-wise, a colon is usually used to introduce a list in a sentence.
