Answer:
Physical characteristics.
Explanation:
She knew what type of birds they were based on their physical characteristics.
She didn't see their nests, or see them eat, and she didn't test and analyze their genetics, so a is the correct option.
Answer:
This is a cluster because they all have similar values
Answer:
my answer would be the 3rd one about blocking it.
True. Joseph is a descendant of King David. (pretty sure)