Which type of trees are generally found in Taiga regions?

A type of forests in India has the following characteristic.

1. Trees have deep roots and thick skin.

2. The trees are generally characterized by waxy leaves and long thorns.

Which of the following types of forests contain the above characteristics?

Trees that do not shed their leaves are mostly found in _____________.

1. Hot desert vegetation
2. Coniferous forests
3. Temperate deciduous forests
4. Tropical monsoon forests