Answer:
True
Explanation:
The semi-major axis of an ellipse is half the length of its major axis.
I think it refers to worldwide mutual dependence between nations/countries as we depend on each other for the key things like food etc. on a worldwide level.
Answer:
Characteristics of a line are the length and that it contains more than one point.
Explanation:
A is correct because the line is measured only in length, as it doesn't have width, angles, etc.
B is correct because the line doesn't possess properties suitable for a volume to measured of it.
C is not correct because a line doesn't produce any sort of power or energy, thus we can not associate it with velocity.
D is not correct because the line doesn't have weight.
E is correct because a line represents numerous points that are connected with each other, thus a line contains more than one point.
Some of the factors would be introduction of non native species, pollution, overgrazing, chemical agents and habitat loss
