Pls help quick claim evidence and reasoning

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure.which would most likely occur in the kidney? a)more water would be transferred from the nephron.b)less water would be absorbed into the nephron.c)the amount of water in the bladder would decrease.d)the amount of water in the blood would increase.

Which of these is not an obstical to the future of space exploration? fundingresearch ideas technologytime