Which of these would be directly related to the science of ecology?

a) developing strains of corn that can withstand a combination of drought and high winds
b) learning about foods that benefit the heart and blood vessels
c) uncovering the genetic makeup of the eastern cottontail rabbit
d) studying how the mayfly population affects the number of trout in a stream

Arecipients list has been loaded into a document. which commands should be clicked in order to filter the list so that letters will not be printed for recipients who live in a certain state? mailings tab, start mail merge, select recipients, type new list, then insert only contacts from the desired states mailings tab, rules, select recipients, use existing list, then choose a recipients list that includes only contacts in certain states mailings tab, select recipients, use existing list, rules, fill in, then type in certain states mailings tab, rules, skip record select “state” under field name, then type in the state name under “equal to”