Identify a community near where you live, such as a
forest, a pond, or your own backyard. Think
about the interactions of the organisms in
this community. Describe an interaction
and identify it as predation, mutualism,
commensalism, parasitism, or competition.
Summarize evidence that supports the claim
and explains your reasoning.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

i think the answer is c hope this