There are more possible answers here.
What we measure in experiments are called observables or variables.
By saying observable or a variable, you're talking about one aspect of one general characteristic of an object. Imagine measuring the length of a leaf. Your variable would be length, which is a characteristic of your object (leaf).
Answer: your answer is B.
Explanation:
your answer is B because thermal energy is energy from the sun and it gives plants the energy to create chemical energy for food.
The correct answer is option C
The main cause of extinction on earth today is the impact of human beings on environment. Previously, extinction caused due many reasons but now the main reason is the involvement of human beings in the environment.
The human activities like deforestation, construction and many more activities adversely effects the population of most of the species.
They first become endangered and then readily if not protected on time becomes extincted.
