It’s either A or E most scientist try to come up with a logical explanation when it comes to nature and why it happens in nature I’m going to say it’s E because they can’t just have a final answer there more and likely going to come up with a rational person explanation
Answer:
9 birds
Explanation:
f is finches, h is herons, w is warblers, t is total
f+h+w=t
All but 6 means subtracted from the total
f=t-6
h=t-6
w=t-6
Adding the three equations gets 3t-18 and plug that back in and isolate
t=3t-18
t= 9
The answer is the last one d
Atomic radii INCREASES when going DOWN a group because of more energy levels and DECREASES going ACROSS a group because of the increasing positive charge of the nucleus pulling in on the electrons.
