Explanation

Option (a) is correct because it describes direct incentives for private forestry investment. Option (b) is also correct as issuing bonds is a method to attract private capital. Option (c) is incorrect because the question asks what 'Private investment' means, and both (a) and (b) are ways to facilitate it. Option (d) is incorrect because options (a) and (b) accurately describe aspects of attracting private forestry investment.