which fitness activity is characterized by constant pushing and pulling against resistance? rowing cross-country skiing swimming cycling stair climbing

Option A

Explanation:

In Rowing a person pushes or pulls the paddle against the resistance of machine belt

In Gyms , a rowing machine is used for rowing which is a form of cardiovascular exercise that enhances the muscle strength and shape there by making it large and lean.  

The work out of upper and lower body is done perfectly by rowing and also it increases the endurance capacity and strength of the body

Hence, option A

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.

what in the weirdo : o