"Which statement best describes the ocean floor?"
a. It is mostly flat, with little distinguishing features.
b. It is mostly covered with undersea mountain ranges.
c. It is varied and includes mostly undersea volcanoes and seamounts.
d. It is varied and includes features such as submarine canyons, atolls, and mid-ocean ridges.

d. It is varied and includes features such as submarine canyons, atolls, and mid-ocean ridges.

Explanation: The floor of the ocean is widely varying, similar to the different types of landforms we see on land. It is made up of seamounts, mountain like formations, trenches and has thriving land forms close to the shore. However, this reduces the deeper the sea floor as sunlight cannot penetrate as easily. Due to the absence of sunlight, plants are fewer and this in turn affects the population of animals that feed on them.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.