Hi, i need these 3 answers to these question

what is the best prediction for what will happen when all of the hydrogens in the sun has undergone fusion?

a. helium nuclei will split to form hydrogen, and the sun will no longer release energy.
b. helium nuclei will split to form hydrogen, and the sun will continue to release energy.
c. helium nuclei will fuse to create heavier elements, but the sun will no longer release energy.
d. helium nuclei will fuse to create heavier elements, and the sun will continue to release energy.

which fields would most likely make use of spectroscopy techniques? check all that apply.

1.food production
2.medical research
3.scientific research
4.space research
5.weather forecasting

ingrid drew a diagram to compare two ways in which biodiversity can be protected.

which label belongs in the area marked y?

a. has the goal of releasing animals into the wild
b. is often done in nature preserves
c. usually protects entire ecosystems
d. focuses on increasing the population of a single species