HELP ASAP
Which of the following words best replaces the underlined word in the sentence? My doctor said that cycling is a great cardiovascular activity?

a. strengthening
c. balancing
b. aerobic
d. none of the above

Please select the best answer from the choices provided

and your question what topic are you in trouble with?

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.