Which list contains only plant phyla?
mosses, annelids, conifers, chordates
mosses, ferns, conifers, flowering plants
cnidarians, mollusks, annelids, arthropods, echinoderms, chordates
cnidarians, mollusks, ferns, annelids, arthropods, echinoderms, flowering plants

The option with mosses, ferns, conifers, flowering plants is the group of phyla which contains only plants.  

Explanation:

Mosses, ferns, conifers, and flowering plants are the four basic groups of the plant kingdom.

Mosses of Bryophyta are primitive non-seeded non-vascular plants which lacks true shoot and root structures.  

Ferns of Pteridohyta are vascular plants with a true root and shoot system but without flowers or seeds

Conifers are woody perennial gymnosperms which are cone-bearing vascular and seeded plants.

Flowering plants are angiosperms and fruit bearing and seed producing plants.  

The annelids, chordates, cnidarians, mollusks, arthropods, and echinoderms belong to kingdom animalia.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

thinking it would be physical characteristics