They can if you want them to and under the right context, but none of these things automatically make people happy.

If you’re grinding away on a treadmill with no motivationto do so, then you likely won’t be happy. If you’re on a scenic bike ride in beautiful weather, then it would likely make you happy.

If you’re "in nature " getting destroyed by mosquitoes you’ll hate life. But enjoying a cool breeze while watching the sun set by the lake could be incredibly joyful.

If socializing is something you enjoy, then it could make you happy. If you’re an introvert who hates people then socializing wont change that.

Personally, spontaneous socializing while on my bike while out in nature makes me really happy.