No links and false answer just for points full explanation please and thank you

Salt water negatively affects the plants by dehydrating them. Plants obtain water with the help of roots system through osmosis which is facilitated by the cells present around the plants' root hairs through which water passes easily. the salt in the soil can actually pull water out of the cells and dehydrate the plant

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)