Answer:
A houseplant is usually small, and darkly colored, whereas an outdoor plant will usually have a brighter color and will more likely to grow in size. Most plants prefer a temperature of around 76-93 degrees Fahrenheit. Meaning if you like your house to be cool, your plants' growth could be stunted.
It is the stalk of the plant
Pluto, Eris, Haumea, Ceres, and Makemake are the answers to this question.
7 is neutral but the ones that would be considered acidic is B