Migratory birds fly to far away places because of ........... changes.
Why birds fly to far away regions every year?
Fill in the following blanks with suitable words : (a) Deforestation increases the level of ___ in the atmosphere. (b) Species found only in a particular area is known as ___ species. (c) A place where animals are protected in their natural habitat is called ___ (d) Satpura National Park is a part of ___ Biosphere Reserve. (e) Red Data Book contains a record of ___ species. (f) Migratory birds fly to far away places because of ___ changes. (g) In reforestation, the planted trees should be generally of the same ___ which were cut down in that forest. (h) Paper can be ___ recycled to ___ times.