En mi casa tengo cuatro (4) productos derivados del cacao: barras de chocolate, te de cacao, mix de cacao, chocolate en polvo.
Chocolate bars, chocolate tea, chocolate mix, powdered chocolate.
Answer:
Nadien is the answer for the blank
Tú casa es grande.

The difference between "tú" and "usted" depends on the formality. "Tú" is used <u>when talking to friends or relatives (informal)</u> while "usted" is used <u>when talking to older people or a person of high social rank (formal)</u>.
In this case we want to write the <u>informal</u> form of "tú", so we use "tú". Also, when dealing with <u>permanent states</u>, the verb "ser" (to be) is used.