The could walk across wet asphalt and get stuck, creating an imprint over time, or they could have more asphalt put on top of them
Answer:
A
Explanation:
You said 'The anser is A trust me.....'
Functional and economically most important mineral in nutrition of layers
is calcium, primary because of egg production, i.e. forming of the egg shell.
Pollution from a near by city is your answer ;D