Choose the correct alternative.

a) Seed-producing trees are left in the forest in
natural regeneration.
forest cultivation.

b) Saplings are planted in the forest in
natural regeneration.
forest cultivation.

c) The best time of year to plant saplings is during the
spring.
summer.
autumn.

d) The sustainable use of forests means that
forest regeneration must be begun straight away after felling.
the natural regeneration of forests must be prioritized over forest cultivation.
you can only cut fewer trees than the forest produces each year.