Which statement best describes the relationship between activation energy and rate of reaction?
Increasing the activation energy can increase the rate of a reaction.
Reducing the activation energy can increase the rate of a reaction.
There is no relationship between activation energy and rate of a reaction.
Reducing the activation energy can decrease the rate of a reaction.

Reducing the activation energy can increase the rate of a reaction.

Explanation:

Reducing the activation energy can increase the rate of a reaction.

Explanation: The rate of a chemical reaction can be defined as the rate of the formation of products or the rate of disappearance of reactants. Activation energy of a reaction is an energy barrier that must be overcome before the reaction can occur. It is the minimum amount of energy that can be possessed by the reactants before products can be formed. Lowering the activation energy of a reaction will therefore increase the rate of the reaction because the reactants will possess enough energy to easily overcome the barrier.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.