As you move down a group, atomic radius increases
A population....... I think
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
The answer to your question is D. Heat Transfer
Answer:
b. calcitonin and parathyroid hormone
Explanation:
calcitonin is needed for the regulation of calcium and phosphate level in the body.
parathyroid hormone is also very important for maintaining blood calcium level.