question: they are not the only thing that determines the amount of investment and are not necessarily even the most important determinant of investment but they do affect investment and so interest rates need to be considered.
Capitalize this past sentence correctly.
A: They are not the only thing that determines the amount of investment and are not necessarily even the most important determinant of investment but they do affect investment and so interest rates need to be considered.

question: when it was time to pack up and leave, they just left the massive heaps of stones behind.
Capitalize this past sentence correctly.
A: When it was time to pack up and leave, they just left the massive heaps of stones behind.

question: it provides practical information in connection with notifying political parties, candidates, and lists, and contains necessary printed matters.
Capitalize this past sentence correctly.
A: It provides practical information in connection with notifying political parties, candidates, and lists, and contains necessary printed matters.