An increase in temperature results in. a. a decrease in the required activation energy while the reaction rate remains constant b. an increase in reaction rate due to a decrease in the kinetic energy of the reactants. c. an increase in the rate of reaction because reactant molecules collide with greater energy d. an increase in both the reaction rate and activation energy due to increased kinetic energy.

answer: that would be cheating

explanation:

"a.) well–developed vascular system."

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]