Correct answer: B). Enzymes
The enzymes are the biological catalyst that reduces the activation energy of the chemical reaction and increase the rate of the reaction without being used up in the reaction. The molecules on which the enzymes act are called as substrates and it converts the substrate into different molecules called as products.
Hence, the correct answer would be ''enzymes''.
The closest point to the Sun in an orbit is called the perihelion.
Answer:
D would be the best answer here.
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(Say somthing if its wrong.)
Answer:
Natural selection is the process of which forms of life having traits that better enable them to adapt to specific environmental pressures, such as predators, changes in climate, or even competition for food or mates. As the species will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.