What is an intensive property of a substance? a. density b. volume c. length d. mass

An intensive property of a substance is A. density

Density is the ratio between the mass of a sample and its volume. So since it's a ratio, it will always be the same regardless of how much of the sample it measured. When a property, like density, is independent of the amount of sample measured, it is known as an "intensive" property.

it would be that mali has the worst literacy rate than the others

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.