What is an example of an event that can compromise an ecosystem? high temperatures seasonal climate change developing land around cities seasonal dry period

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

a community that experiences major changes undergoes progress