Question

the energy needed to start a reaction is called the
promoting energy
reacting energy
starting energy
activation energy
6/20

Explanation:

The question is about the energy needed to start a chemical reaction. In chemistry (a subfield of Natural Science), the energy required to initiate a reaction is defined as activation energy. Among the options, "activation energy" matches this definition.

Answer:

D. activation energy (assuming the options are labeled A to D with A: promoting energy, B: reacting energy, C: starting energy, D: activation energy)