*in india, there are 3 types of railway gauges
- broad, metre and narrow. sometimes, broad
gauge lines are indicated as double track or
single track. on the double track, trains ply
on two sets of railway lines at all times while
on single tracks trains ply only on one set of
railway lines at regulated intervals. in
q. what do you by "regulates intervald"

answer: option d.

explanation:

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

identify consequences of international trade.

identify consequences of international trade.