How is this ecosystem MOST likely to be affected by a sudden decrease in the number of rats?

What is the value of the digit 1 in the number 13?

Which expression gives the area of the triangle shown below

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values