Please choose the correct ending to complete the given sentence: Work World: [header] How to become an ornithologist [title] Focus on life sciences in high school. [step] While it's not necessary to intensely focus on life science classes in high school, it can help you get a jump start on a career in ornithology. Start with classes like biology, as well as classes like anatomy and physiology.

Ending1: [substeps] If you're a bachelor in biology, you'll want to focus on science. Chemistry and physiology is part of your top choices, but you can keep up with advanced classes in both. Ending2: Following in-college coursework on subjects like anatomy or physiology will be appropriate to a busy career as an ornithologist. [substeps] Try to take as many courses as possible, including anatomy and physiology in high school. Ending3: [substeps] Consider taking concurrent classes at a local college. That way, you can really get an idea of what the field is like before jumping in. Ending4: You'll then move up to the personal sciences, such as physics, biochemistry, and chemistry. [substeps] Do an online search online to find out more about your college studies and major.

Answer format: ending1/ending2/ending3/ending4