Some alternatives of "cultivate" could be nurture, develop, foster, or promote.
Yes because simpler alternatives are usually easier
Carrots are good alternatives for vitamin c.
There are no good alternatives to air travel, nothing gets you there faster and safer.
Does anybody know a good alternative for pectin
There are many good alternatives to Powell's books. Bookstores like Barnes and Nobel as well as waldenbooks are great alternatives to Powell's books.
There are no good alternatives to having smoke alarms in your house. A good supplement to the smoke detector, however, would be a Carbon Monoxide alarm.
how can we develop our society?
Break a leg.
alternatives
Fossil fuels, our primary source of power, will someday run out. As a result, we need to develop other, possibly safer alternatives.
There are several different alternatives to Joomla's web hosting. One of the most popular would be WordPress, which is good and secure. Drupal is another good alternative.