Which of these traits are challenges of life for all (check all that a. reproducing. b. getting sunlight. c. hiding or running. d. maintaining structure. e. swimming upstream. f. obtaining energy. g. laying eggs

The traits that are challenges of life for all organism is : 

A. Reproducing,
Both male and female seek the partners that potentially provide the best genetics

D. Maintaining structure
That's why we strive to provide necessary nutrition for our body such as protein and calcium

F. Obtaining energy
To do our day to day activities we need calorie consumption

hope this helps

The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water