Anna Svalova

* * *

If you have a uncountable noun (which "nature" can be both countable and uncountable), then you would have to repeat the uncountable noun in the second part as we have no proper pronoun for it in this context: This medication supports healthy tissue and destroys bad TISSUE.

Образование совершенствует добрые натуры и исправляет плохие

* * *

You need articles here. Also NATURE is singular, so you need ONE. If it were a plural noun, you would use ONES: Loyal friends encourage good HABITS and discourage BAD ONES.

время проката