Most of our energy waste in north america results from group of answer choices
a. a failure to turn off lights.
b. technological inefficiency.
c. the fact that more efficient energy conversion is not possible.
d. overwhelming public ignorance of conservation issues.
e. the fact that energy conservation techniques are quite expensive.

Technological inefficiency.

Explanation:

The energy in North America is wasted based on the facts that the efficiency of the technology is not upto the mark. In this case the waste generation of energy takes place.

This is because the total energy that is generated cannot be stored in such a way that it can be used in future.

The wastes generation is more rather than the consumption as there is so much of the technological  inefficiency there in North America.  

answer; i believe the correct answer is (a)0

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]