In a pine forest, there are different species of

birds known as warblers that are able to coexist

on the same pine trees. The Cape May warblers

feed on insects located on the tips of the highest

pine branches. The yellow-rumped warblers

feed on insects on lower branches of the same

trees. The different feeding locations for these

two species of warblers indicate that they have

different

(1) niches

(2) ecosystems

(3) methods of asexual reproduction

(4) methods of selective breeding