Into which vein does the highlighted duct empty lymph?
a) right subclavian vein
b) right common carotid artery
c) superior vena cava
d) right external jugular vein

i would say it is

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

d. changes in climate and historical records

hope this