17. What are the 4 ways the presidency may be vacated? Also 18-20

Death

Disability

Resignation

Impeachment (with removal)

Explanation:

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in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.