Tina suffers from anorexia nervosa. she is depressed and lacks self-confidence. though she is extremely thin, she continues to lose weight at a rapid rate. based on this information, the most important first step in treating tina will be to:

Stabilize her weight.

Explanation:

Anorexia nervosa may be defined as the medical condition in which individual loses his weight with the growing age. This is a type of eating disorder, that can distort the body image of an individual.

Tina is extremely thin and continuously loosing her weight. The first treatment that can be given to Tina is the stabilization of her weight. The healthy food with proper balanced diet and proper medication is helpful for Tina to stabilize her weight.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.