Which OF THESE is a reason why a bird 'sings'? a. To mark out its territory to others of its own species

b. To frighten other birds that may attack / eat it

c. To attract its food like worms and insects

d. To wake up other birds and animals

Quick

According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.