The posterior opening is called the anus
Sean, who weighs the least of the three, will have the highest blood alcohol concentration (BAC).
The less a person weighs, the more they will be affected by a given amount of alcohol. People of the same weight, even the same gender, individuals with a lower percentage of body fat will have lower blood alcohol concentration than those with a higher percentage of body fat.
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Answer:
Dead plant matter
Explanation:
Saprotrophs feed by a process known as absorptive nutrition, in which the nutritional substrate (e.g., dead organism or other nonliving organic matter) is directly digested by a variety of enzymes that are excreted by the saprotroph.

your answer is given below..
The environment is rich in infectious agents that transmit disease through pathogens.