The main food sources of the birds( the plentiful recourses within the environment occupied by the species)
Thermal energy transfer. Ex. Hot to Cold
Answer: Option (A) is the correct answer.
Explanation:
Beaches are the places which are part of shore of an ocean, sea, large river etc.
There are pebbles and sand at the shore of a beach. Waves of water in an ocean always change the ocean due to erosion and addition of sand.
It is the force acted by the wave that pushes or pull the sand in different directions every time the wave comes.
So we can conclude that the statement beaches are always changes due to factors such as waves adding and eroding sand best describes beaches.
A vaccine uses a live pathogen that is too weak to make you sick. Once it enters your body you defeat it easily. Now that yur body is familiar with it your body can fight off the disease in the future.
