During embryonic development, if the anus develops before the mouth, the organism is a

If the anus develops before the mouth, the organism is a deuterostome, which means  "second mouth." It is a sister clade of Protostomia, with which it forms the Nephrozoa clade. The proterostomic develop the mouth first. Deuterostomes are also known as enterocoelomates because their coelom develops through enterocoely. 

Explanation:

https://www.mun.ca/biology/scarr/Protostomes_vs_Deuterostomes.html

https://en.wikipedia.org/wiki/Deuterostome

https://ucmp.berkeley.edu/phyla/deuterostomia.html

https://www.weegy.com/?ConversationId=6CB3C815

well

explanation:

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.