What makes plant material more difficult to digest?

Cell walls can make plant material difficult to digest. Many herbivorous mammals have wide molars. These big teeth help them grind up leaves and grasses. Carnivorous mammals, on the other hand, usually have long, sharp teeth that help them grab prey and rip it apart. A group of herbivores called ruminants have specialized stomachs.

Explanation:

preservation because he preserves part of the land and preserves means save

explanation:

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.