Составьте предложения с словосочетаниями на : 1a primitive dwarf elephant 2environmental conditions 3 limited food supply 4minimising energy requirements

1. A primitive dwarf elephant, known as Dwarf Stegodon was first believed to have gone extinct 840,000 years ago. 
2. His study was about the effects of various environmental conditions on the rate of transpiration in plants.
3. The astronauts had limited food supply during their work at the space station.
4. Minimising energy requirements of the space ship was their task.