Hello Mrs. NIMAGA,
Thank you for the question, and here is my answer.
The implementation of development programs goes through successive stages until the desired / intended changes are achieved. For example, if we decide to reduce "malaria-related mortality" in an area, the desired change is the reduction of the mortality rate (outcome, result). To achieve this end, we thought that people should use insecticide-treated mosquito nets much more. It is therefore necessary to increase the rate of use of impregnated mosquito nets (output, products or achievements). For people to start using the impregnated mosquito nets much more, we distributed them. The distribution of impregnated mosquito nets is the activity. To be able to carry out this activity, we had to stock up mosquito nets, fuel, etc. (these are the inputs).
Here is an explanatory example that could help you. I remain available to answer other questions.
I agree your text, except one point. We cannot say that "Monitoring and Evaluation is less concerned with activities and outputs." This assertion is true for evaluation, but not for monitoring. For, monitoring is mainly concerned with the activities and outputs.