Mark's abuse of alcohol and other addictive drugs is influenced by genetic factors, by the ready availability of drugs in mark's neighborhood, and by mark's failure to accurately assess the risks associated with drug usage. an understanding of mark's difficulties within the framework of multiple levels of analysis is most clearly provided by

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: