Fact 1: Reproduction is the process by which organisms give rise to offspring. Fact 2: Reproduction is sexual with internal fertilization. Given the two facts above, what allows organisms to give rise to offspring?

Options: 1). peachleaf willow; 2). colon; 3). lungs; 4). fertilization; 5). spread flower seeds; 6). photosynthesis; 7). aerobic capacity; 8). Plants growth;
Answer:
4).