Scientists discovered that stars in the universe are mostly composed of which elements? A. hydrogen and helium
B. hydrogen and oxygen
C. oxygen and nitrogen
D. helium and nitrogen

What is the phylum of soft bodied animals with a true bosy cavity and a three part body consisting of a foot visceral mass and a mantle

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Which locations on the map are low-pressure areas? a b c d e