Racism (for religion, skin color, and race), and sexism. (That's all I know for now. Sorry if it didn't help. :( )
Answer:
B H I G F C N M D E M O K J A
this is the best i could do. sorry if some are wrong.
Explanation:
I'm no expert at all so don't take my word but number one looks like it will make the most sense. Because it has the word reproductive system and yeah...
I believe the answer should be "Is especially important during physical activity."