Hi Guys, Can anyone help me. I will add the brainliest answer.
Please try to answer as quickly as possible.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

d. planting trees

the trees take in carbon to make oxygen.

b is the answer and if you need further with anything message me

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.