according to the chart, if holly complained to her mother that her stomach hurt and she could not breathe, which organ systems are most likely being affected ?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

If anyone who can me with this hw? i would really appreciate it