What human activity would cause a decrease in the population of another species? (the action of humans would impact one species, and this change would cause a decrease in the poulation of another species.)
a. the polar bear population is effected by seal hunters
b. salmon are eaten by the bears which are hunted by humans.
c. fungi decompose a diseased rosebush
d. vultures feed off the bodies of birds killed by an oil spill

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why. a.) student. course. callnum = "csc230"; b.) cin > > student. name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student. name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist. course. credits = 3; j.) course = studenttype. course;