No.
Pine trees should be planted about 10-15 feet apart to achieve optimal privacy.
no they eat pine trees
Boughs.
There are many varieties of pine trees. I'll assume we are talking about the White Pine; most popular in the temperate zone. They like well drained, slightly acidic, moderately fertile soils, planted in full sun. Stay away from heavy clay soils. Or if planted in heavy clay soils plant the tree in a mound above the adjacent finished grades to provide better drainage away from the root system. Most pines will do best with these conditions.
Some common tree seeds that can be easily planted in a garden include acorns from oak trees, maple seeds from maple trees, and pine cones from pine trees.
Most likely the are watered too much.
No, but cows can destroy pine trees by rubbing the bark off, chewing off the twigs and branches, etc. Pine trees are actually poisonous to cattle, especially to pregnant cows.
if their small enough they can be planted by hand but if their to big their usually planted by machines so there really is no right or wrong answer to that question
Roots, trunk, branches, twigs , needles and cones.
due to very slow growth
Female cicadas lay eggs in grooves they carve in the branches of trees.
Sounds like the Engelmann Spruce to me.