Which of these is a biotic factor in a forest
a. climate
b. trees
c. terrain
d. water

Trees  is a Biotic factor in a forest

Explanation:

The living parts of the ecosystem is called as the biotic factor. These biotic factor influences the the structure and shape of the ecosystem.In the given options trees is the only living component. so tree is the only biotic factor. Trees are the most important factor of forest ecosystem.

Trees dominate the forest ecosystem, it contains many species in a small area. In forest, trees bring unique combination of genetical and biological species. Trees are the most longest lived creatures on the earth, Forest trees have wide range of genome size.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed