Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports

B) Prop roots

Explanation:

Mangrove trees grow near the water edges where the soil is wet and muddy. They are often subjected to waves and flooding. As a mean of extra support, they develop pitchfork like roots from the lower nodules in addition to the original root system. These are called prop roots which go down in the soil and anchor themselves. They branch further by trapping sediments in order to provide additional support.    

C. absorb carbon dioxide from the air

answer: all : )

explanation: