Science of, or study of contours, or the lines outlining a scene, drawing, etc.
Answer:

Explanation:
Here, we wnat to get the most electronegative atom
On the periodic table, electronegativity increases across a period and decrease down the group
The elements listed are in the same group
Boron is the first member of the group
Boron is the most electronegative atom in the group
The data gotten from ice cores could scientists tell the about future climate change.
Here you are! I hope it helps, and also for the ones I put a red ‘x’ it depends on how you round it.