Which of the following is correctly matched? The circulatory system exchanges gases with the environment.
The digestive system carries nutrients around the body.
The skeletal system breaks down food to allow the body to get nutrients.
The integumentary system is the first layer of defense for the body.

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind